SOLUTION: Here's my question. A car 15 feet long overtakes a truck 30 feet long which is travelling at a rate of 45 miles per hour. How fast must the car travel to pass the truck in 3 second
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Question 633104: Here's my question. A car 15 feet long overtakes a truck 30 feet long which is travelling at a rate of 45 miles per hour. How fast must the car travel to pass the truck in 3 seconds? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! A car 15 feet long overtakes a truck 30 feet long which is traveling at
a rate of 45 miles per hour.
How fast must the car travel to pass the truck in 3 seconds?
:
The car has to cover the sum of the lengths of the car and the truck (at least)
to pass, which is 45 ft
:
Find the speed required to cover 45 ft in 3 sec, add that to 45 mph
:
45/3 = 15 ft/sec
How fast is that in mph = 10.227 mph faster than the truck
therefore
45 + 10.227 = 55.227 mph, the speed of the car
