SOLUTION: A driver of the car took a day trip around the California coast line driving at two different speed. He drove 70 miles at a slower speed and 300 miles at a speed 40 miles hour fast
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Question 462101: A driver of the car took a day trip around the California coast line driving at two different speed. He drove 70 miles at a slower speed and 300 miles at a speed 40 miles hour faster. If the time spent during the faster speed was twice that spent at a slower speed, find the two speeds during the trip. Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! let slower speed = x ===> distance = 70
faster speed= x+40 ====> distance = 300 miles
t=d/r
2(70/x) = (300/(x+40))
..
cross multiply
140(x+40)=300x
140x+5600=300x
160x=5600
x=35 mph
faster speed = 75 mph
