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Question 1079781: an ambassador car weighing 2 tones accelerate at rate of 3m/s^2. in the first gear from a speed of 10 km/h to 20km/hr. the gradient is +1% and the road has asphalt surfacing. the cat type have a radius of 0.33m the rear axel gear ratio is 3.82:1 and the transmission gear ratio is 2.78:1. calculate the engine horse power needed and the speed of the engine
Click here to see answer by solver91311(24713)

Question 1079962: In the Cartesian system, points (x, y) have a distinct representation. Why isn't this true for a point (r, Θ) in the polar coordinate system? Thanks.
Click here to see answer by ikleyn(52752)

Question 1079824: Use the fact that f(x)=sqrt (x) is increasing on its domain to solve the inequalities:

sqrt(8−5x)≥sqrt(x+7)
Click here to see answer by Theo(13342)

Question 1080060: Two slow trains are traveling on the same route on parallel tracks. Train I is 5.8 kilometers from you and traveling away from you at 0.7 kilometers per hour. Train II is 58.6 kilometers and traveling toward you at 2.6 kilometers per hour.After how many hours will the trains be at the same distance from you?
Click here to see answer by jorel1380(3719)

Question 1080075: One maid can clean the house in 8hr. Another maid can do the job in 4hr. How long will it take them to do the job working together?
Click here to see answer by josgarithmetic(39613)

Question 1080080: The Healey family drove 192 miles in 4.5 hours. How many miles could they drive at this rate in 3 hours?
Click here to see answer by josgarithmetic(39613)

Question 1080072: Please help me with this word problem on finding the average speed...
Julio left the hospital and drove toward his friend's house. One hour later Chelsea left driving 10 km/h faster in an effort to catch up to him. After four hours Chelsea finally caught up. Find Julio's average speed.
Click here to see answer by ankor@dixie-net.com(22740)

Question 1080092: a family traveled 135 miles by train then traveled 885 miles by plane. the speed of the plane was three times the speed of the train. if the total time of the trip was 6 hours, what was the speed of the train?
Click here to see answer by josgarithmetic(39613)

Question 1080095: Marco can build a laptop twice as fast as Cliff. Working together, it takes them 5 hours. How long would it have taken Marco working alone?
Click here to see answer by ikleyn(52752)

Question 1080130: The temperature of air at 2000 metres is -8 degrees C. At ground level the temperature is 28 degrees C. The temperature changes at the same rate every 1000 metres. What is the temperature at the height of 2500 metres?
Click here to see answer by josgarithmetic(39613)

Question 1080242: if i crawled 500 meters in 4 hours then for the next four hours my pace was three times faster how far did i travel in eight hours
Click here to see answer by Alan3354(69443)

Question 1080258: A plane, that can fly an average of 400 mph in still air, makes frequent round trips from city A to city B. When the wind is blowing at an average rate of 20 mph the flying time for the entire round trip is 12 hours. how far is it from city A to city B?
Click here to see answer by josmiceli(19441)

Question 1080264: Emily travels in an airplane a distance of 2880 km. For one-third of the distance, the airplane flies at a speed of 720 km/h, and for the rest of the distance, it flies at a speed of 880 km/h. How long does the trip take?

Click here to see answer by ikleyn(52752)

Question 1080360: A car travels 200 km west, 100 km south , and finally 150 km at angle 600 south of east. What is the net displacement of the car
Click here to see answer by Alan3354(69443)

Question 1080381: Andrew participated in a bicycle race. The total distance covered was 56 miles. If he cycled at a constant rate of 14 miles per hour, how much time did Andrew take to complete the race?
A. 1 hr.
B. 4 hr.
C. 7 hr.
D. 9 hr.

Click here to see answer by rapture(86)

Question 1080467: Duncan traveled to a city 190 miles from his home to attend a meeting. Due to car trouble, his average speed returning was 12 mph less than his speed going. If the total time for the round trip was 7 hours, at what rate of speed did he travel to the city?
Click here to see answer by josgarithmetic(39613)

Question 1080548: the speed of train A is 14 mph than the speed of train B .Train A travels 220 miles in the same time it takes train B to travel 290 miles. Find the speed of each train.
Click here to see answer by Fombitz(32388)

Question 1080564: Pablo and faustino start runnin from the same location in the same direction. Pablo runs 8 miles per hour and faustino runs 6 miles per hour. After how long will they be 1/2 mile apart?
Click here to see answer by Alan3354(69443)

Question 1080605: A car travels 10 miles in 15 minutes. Find the cars average speed in miles per hour.
Click here to see answer by Alan3354(69443)

Question 1080617: A plane travels at a speed of 155⁢mph in still air. Flying with a tailwind, the plane is clocked over a distance of 950 miles. Flying against a headwind, it takes 3 hours longer to complete the return trip. What was the wind velocity?
I think I should have (950/(155-w)) - (950/(155+w)) = 3
but I'm unsure of what to do.
Click here to see answer by MathLover1(20849)

Question 1080645: Sarah can run 3 miles per hour faster than her sister Melissa can walk. If Sarah ran 12 miles in the same time it took Melissa to walk 8 miles, how fast was each sister travelling?
Click here to see answer by jorel1380(3719)

Question 1080731: If the actual distance was 175 mi. and it measured 1.4 in. on the map, what is the scale?
Click here to see answer by Boreal(15235)

Question 1080740: dave traveled 280 miles at a certain speed (rate). If he had gone 5 mph faster, the trip would have taken 1 hour less what was his original rate?
Click here to see answer by Alan3354(69443)

Question 1080831: A cyclist rode from town A to town B and back, a distance of about 3 km each way. On the trip out, there was a 8-km/h tailwind. On the return trip, there was a 6-km/h headwind. The total riding time was 5 h. To the nearest tenth of a kilometre per hour, what is the cyclist�s average speed when there is no wind? Explain your solution.
Click here to see answer by ikleyn(52752)

Question 1080849: A train travels at constant speed of 100 km/h.How many kilometers does it travel in 12 minuets?
Click here to see answer by josgarithmetic(39613)

Question 1080871: A car travels 5miles on 2gallons of gasoline,calculate the number of gallons the car will use to travel for 7.45miles.
Click here to see answer by Alan3354(69443)

Question 1080882: A plane leaves from town A and flies 400km on a bearing of 210�. Calculate how far of A the plane travelled?
Click here to see answer by Alan3354(69443)

Question 1080922: A northbound train left at midnight. Three hours later, a southbound train left the same station.
At 6 a.m. the two trains were 330 miles apart. Find the rate of each train if the northbound train traveled 10 miles per hour faster than the southbound train.
Draw graph to display problem.
Click here to see answer by Fombitz(32388)

Question 1080947: Every morning Diane runs 6 miles in about an hour. What is her rate in feet per second? What equations would you use to solve? Explain and show your work.
Click here to see answer by Alan3354(69443)

Question 1080819: two airplanes leave the same airport, one heads north and the other heads east. after some time , the northbound airplane has traveled 12 mins if the two airplanes are 20 miles apart how far has the eastbound airplane traveled
Click here to see answer by ankor@dixie-net.com(22740)

Question 1080950: Elena went on a 6-mile walk. She completed the first half of the walk 1 mi/h faster than usual and the second half of the walk 2 mi/h slower than the first half.
a. If it took her 7.2 to complete the walk, what is her usual rate?
b. What is the formula necessary to solve this problem?
Click here to see answer by josgarithmetic(39613)

Question 1081046: please help me solve this question A car travels at 60km per hour. How far does it travel in 5 hour 20 minutes
Click here to see answer by Boreal(15235)

Question 1081046: please help me solve this question A car travels at 60km per hour. How far does it travel in 5 hour 20 minutes
Click here to see answer by amfagge92(93)

Question 1081046: please help me solve this question A car travels at 60km per hour. How far does it travel in 5 hour 20 minutes
Click here to see answer by MathTherapy(10549)

Question 1081048: Please help me solve this question A car travels at 60km per hour. How far does it travel in 5 hour 20 minutes.
Click here to see answer by Alan3354(69443)

Question 1081048: Please help me solve this question A car travels at 60km per hour. How far does it travel in 5 hour 20 minutes.
Click here to see answer by MathLover1(20849)

Question 1081048: Please help me solve this question A car travels at 60km per hour. How far does it travel in 5 hour 20 minutes.
Click here to see answer by MathTherapy(10549)

Question 1081094: What is the connection between Newton second law with work done

Click here to see answer by ikleyn(52752)

Question 1081137: The Keppler telescope NASA sent into deep space to took for planets that closely resemble earth in structure and mass found one orbiting a star similar to our sun. This planet is approximately 12,000 light years away. A light year is how far light travel in one year, this how scientists measure distance in space. Light travels approximately 6,000,000,000,000 miles in one year. How many miles away is this interesting Earth-like planet scientists have discovered? Represent the answer in scientific notation.
Click here to see answer by Alan3354(69443)

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