Tutors Answer Your Questions about Travel Word Problems (FREE)
Question 736018: I am a librarian. A patron needs a solution to this problem:
The speed of a boat in still waters is 10 km/h
The boat travels 12 km upstream and 28 km downstream in a total of 4 hours.
What is the speed of the stream?
Thanks
Click here to see answer by mananth(16946)  |
Question 736297: Lily's family took a motor boat 24 km down a river for a picnic. It took them 1 hr to get to the picnic spot. The ride back to the dock took an hour and a half. What was the average speed at which the river flowed? What would the boat's average speed be on a lake?
Click here to see answer by mananth(16946)  |
Question 736344: a river boat can travel at 20km per hour in still water. the boat travels 30km upstream against the current then turns around and trevels the same distance back with the current. if the total trip took 7.5 hours, what is the speed of the current?
this is what i`ve got..
Please tell me if I`m wrong...
Thank you
Click here to see answer by josgarithmetic(39630) |
Question 736425: A van departs from a rest stop at 9am heading west and travels at an average rate of 40 miles per hour. two hours later a car departs from the same rest stop also heading west and travels at an average rate of 65 miles per hour. at what time will the car catch up to the van and how far will they have traveled at that time?
I need to build an equation, and so far all i have is this;
Rate x Time = Dist
40 x 40x
40-x 2 2(40-x)
this just feels all wrong... 40x + 65(2+x) =
9
Click here to see answer by mananth(16946)  |
Question 736420: A BOAT TRAVELED 336 MILES DOWNSTREAM AND BACK. THE TRIP DOWNSTREAM TOOK 12HOURS. THE TRIP BACK TOOK 14 HOURS. WHAT IS THE SPEED OF THE BOAT IN STILL WATER? WHAT IS THE SPEED OF THE CURRENT? SOLVE USING A SYSTEM OF TWO EQUATIONS
Click here to see answer by mananth(16946)  |
Question 736465: Malik drove his car for 45 miles at an average speed of r miles per hour. On the return trip, traffic has increased, and Malik's average speed in 3/4r. The round trip took a total of 1 hour and 45 minutes. Find the average speed for each portion of the trip.
Click here to see answer by josmiceli(19441)  |
Question 736464: Malik drove his car for 45 miles at an average speed of r miles per hour. On the return trip, traffic has increased, and Malik's average speed is 3/4r. The round trip took a total of 1 hour and 45 minutes. Find the average speed for each portion of the trip.
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 736505: a Kayaker traveled 20km/h into the current and 7/5 the speed with the current, What is the speed of the kayaker in still water and what is the speed of the current?
A motorcycle breaks down and the rider must walk the rest of the way to work. the motorcycle averaged 55mph, and the rider walks at the speed of 5mph. The distance from home to work is 100 miles, and the totale time for the trip was 4 hours. how far did the motorcycle rider walk?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 736793: two planes having the same airspeed depart at the same time, flying in opposite directions. one plane flies into 35mph wind, and the other flies in the same direction as the wind. After a period of time, on plane has traveled 460 m an the other has traveled 404 m. let x = airspeed of each plane ( airspeed is the same for each plane)
a) write an expression for the speed of the plane traveling into the wind.
b) Traveling with the wind
c) write an expression for the time the same plane has been in the air when it has traveled 460 m
d) what is the relationship for the times the planes have been in the air
c) write an equation modeling this relationship.
Click here to see answer by mananth(16946)  |
Question 736876: John drives along a straight motorway at a constant speed for 120km. Next day he completes the same journey travelling 10km/h faster. He completes this journey in 10 mins less than the first journey. find the 2 speeds at which he travelled.
Please help!I know d=s x t.
120=t x s
120= t-10 x s + 10.
Have come up with various answers- none of them right!
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 736991: Two escaped convicts are headed east on the railroad tracks. They come to a mile-long tunnel; they have little choice but to enter. They are 0.4 mile into the tunnel when they hear an eastbound train closing in on them from behind. Oh no!
Snap decisions are required. The younger, faster convict decides to run the 0.4 mile back out of the tunnel (even though the train is coming at him!). The older and slower convict decides to run the remaining 0.6 mile to the far end of the tunnel. (He will run away from the train because it gives him more time to escape.)
The fast convict runs at 11 miles per hour; the slower convict runs at 7 miles per hour. The train travels at a steady rate. Each man manages to exit the tunnel at the last possible second. Close calls!
Question: what was the speed of the train?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 736962:
In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is 15 A (amperes), the resistance is 18 ohms. What is the resistance when the current is 2A ?
Click here to see answer by checkley79(3341) |
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