Tutors Answer Your Questions about Travel Word Problems (FREE)
Question 860903: An airplane flew to San Diego with a tailwind and averaged 485 miles per hour. On the return trip the plane only averaged 275 miles per hour. find the speed of the wind and the speed of the plane in still air.
Click here to see answer by mananth(16946)  |
Question 860930: Erin starts riding her bike. She is travelling at 10km/h. An hour after Erin starts, her sister, Makayla starts riding her bike. She is travelling at 16km/h. After how long (time) will Makayla catch up to her sister?
Click here to see answer by mananth(16946)  |
Question 860931: Erin starts riding her bike. She is travelling at 10km/h. An hour after Erin starts, her sister, Makayla starts riding her bike. She is travelling at 16km/h. After how long (time) will Makayla catch up to her sister?
Click here to see answer by mananth(16946)  |
Question 860957: Ben and Bob covered the same distance at 3 mph and 4 mph, respectively. If the difference between Ben's time and Bob's time is one third of an hour, what distance did they cover?
Thanks ahead for the help (:
Click here to see answer by dkppathak(439)  |
Question 860964: a cyclist traveled 60 mi at a constant rate before reducing the speed by 7mph. Another 40 mi was traveled at the reduced speed. The total time for the 100-mile trip was 9 h. Find the rate during the first 60 mi.
Click here to see answer by stanbon(75887) |
Question 861017: It takes a small sprinkler 12 min longer to soak a lawn than it takes a large sprinkler. Working together, the sprinklers can soak the lawn in 8 min. How long would it take each sprinkler, working alone, to soak the lawn?
small sprinkler
______
min
large sprinkler ______ min.
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 861339: a local bus travels 8 mph slower than the express bus. the express bus travels 60 miles in the same time it takes the local bus to travel 48 miles. find the speed of the local bus and the speed of the express bus.
Click here to see answer by mananth(16946)  |
Question 861365: Two planes start from Manila Airport and fly in opposite direction. The second plane starts 0.5 hours after the first plane, but its speed is 80 km/h. Find airspeed of each plane if 2 hours after the first plane departs, the planes are 3200km apart.
Click here to see answer by mananth(16946)  |
Question 861365: Two planes start from Manila Airport and fly in opposite direction. The second plane starts 0.5 hours after the first plane, but its speed is 80 km/h. Find airspeed of each plane if 2 hours after the first plane departs, the planes are 3200km apart.
Click here to see answer by richwmiller(17219)  |
Question 861388: Please I need help solving this word problem.
One integer is 10 less than 3 times another. The sum of their squares is 100. What are the two integer
Here is how I set up my equation. x(10-3x)=100
10x-3x^2=100
10x-3x^2-100=0
3x^2-10x-100=0
Click here to see answer by richwmiller(17219)  |
Question 861393: Two trains leave the station at the same time, but headed in opposite directions. The first train travels 10mph faster than the second train. After six hours they are 720 miles apart. What are the speeds of the trains.
Click here to see answer by checkley79(3341) |
Question 861458: The figure shows the elliptical orbit of Mercury, whose minimum distance to the Sun is 29 million miles and whose maximum distance to the Sun is 43 million miles. According to Kepler's laws, the average distance of a planet to the Sun is equal to half the length of the orbit's major axis. The average distance of Mercury to the Sun is million miles. (Enter only the number.)
I subtracted 43-29= 21.5 but I don't know if it is correct or not. Please Help!
Click here to see answer by solver91311(24713)  |
Question 861458: The figure shows the elliptical orbit of Mercury, whose minimum distance to the Sun is 29 million miles and whose maximum distance to the Sun is 43 million miles. According to Kepler's laws, the average distance of a planet to the Sun is equal to half the length of the orbit's major axis. The average distance of Mercury to the Sun is million miles. (Enter only the number.)
I subtracted 43-29= 21.5 but I don't know if it is correct or not. Please Help!
Click here to see answer by richwmiller(17219)  |
Question 861463: To reach her friend’s house, Samantha has to drive 9 miles north, turn left and drive 3 miles west, and then finally take another left and drive 3 miles south. What is the shortest distance between Samantha’s house and her friend’s house?
Click here to see answer by richwmiller(17219)  |
Question 861724: 1. A loco is traveling at 12km/h when brakes are applied and it takes the loco 6 seconds to come to rest. What is the average deceleration rate and is it with-in the required specification?
E-Mail adress: attievdm@areng.co.za
Click here to see answer by Fombitz(32388)  |
Question 861765: A Motorist travels 90 kms. with the speed of 60 km/hr and the next 40 kms distance with the speed of 40 km/hr. what is his average speed during the journey?
1) 50kms/hr
2) 100kms/hr
3) 45kms/hr
4) 48kms/hr
My Solution:
Finding times for two cases by the formula Total Time = Total Distance / Avg. Speed
Case 1:
Time = 90kms / 60kms/hr = 1.5hrs
Case 2:
Time = 40kms / 40kms/hr = 1hr
Adding two times = 2.5hrs
Adding two distances = 130kms
We find avg speed = 130 / 2.5 = 52kms/hr
But the answer is wrong this way.
One more simple thing i did is find the average of = (40 kms/hr + 60 kms/hr)/2 = 50km/hr which is also wrong.
The Answer is 48km/hr. Please explain how.
Click here to see answer by richwmiller(17219)  |
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