SOLUTION: 2 cars are traveling to a place 280 km away. One car leaves 20 minutes before the other and goes 40km/h. What is the speed of the 2nd car if they both get to the place at the same
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Question 526617: 2 cars are traveling to a place 280 km away. One car leaves 20 minutes before the other and goes 40km/h. What is the speed of the 2nd car if they both get to the place at the same time? Answer by oberobic(2304) (Show Source):
You can put this solution on YOUR website! Car 1.
d = r*t
d = 280 km
r = 40 km/hr
t = d/r
t = 280/40
t = 7 hr
.
Car 2.
t = 6 hr 40 min = 6 2/3 hr = 20/3 hr
d = 280 km
r = 280/(20/3)
r = 280 * 3/20
r = 14*3
r = 42 km/hr
,
Done.
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