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
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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):
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
