SOLUTION: you travel 350 miles in the same amount of time it takes a friend to travel 400 miles. your friends average speed is 4 miles per hour greater than your average speed. find your fri

Question 839516: you travel 350 miles in the same amount of time it takes a friend to travel 400 miles. your friends average speed is 4 miles per hour greater than your average speed. find your friends average speed
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
My speed x mph
Friend's speed 4 faster x + 4 mph

My speed 350 miles
Friend's speed 400 miles
My time = Friend's time
t=d/r
350 / x = 400 /( x + 4 )
cross multiply
350 ( x + 4 ) = 400 x
350 x + 1400 = 400 x
350 x - 400 x = -1400
-50 x = -1400
/ -50
x = 28 mph

150 mph My speed
154 mph Friend's speed

RELATED QUESTIONS
Katherine travels 350 miles in the same amount of time it takes Christine to travel 400... (answered by jorel1380)

you and your college roommate travel to your respective hometowns in the same amount of... (answered by checkley77)

The speed of a boat in still water is 15 mi/hr. If the boat travels 8 miles downstream in (answered by nyc_function)

You can travel by boat 8 miles downstream in the same amount of time it takes you to... (answered by josmiceli)

The speed of a stream is 4 miles per hour. If a boat travels 46 miles downstream in the... (answered by richwmiller)

The speed of a boat in still water is 4 miles per hour. If the boat travels 5 miles... (answered by mananth)

a boat can travel 18 miles up a river in the same amount of time it takes to travel 42... (answered by ankor@dixie-net.com)

Ellen's motorboat can travel 30 mi/h in still water. If the boat can travel 7 miles... (answered by stanbon)

A boat can travel 12 miles upstream in the same amount of time it takes to travel 18... (answered by mananth,stanbon)