SOLUTION: A helicopter traveling at an average speed of 225 km/h left San Jose 1 hour after a train that had departed at 7:00 AM. If the helicopter over took the train in 0.8 hours find the
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Question 921098: A helicopter traveling at an average speed of 225 km/h left San Jose 1 hour after a train that had departed at 7:00 AM. If the helicopter over took the train in 0.8 hours find the average speed of the train. Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! A helicopter traveling at an average speed of 225 km/h left San Jose 1 hour after a train that had departed at 7:00 AM.
If the helicopter over took the train in 0.8 hours find the average speed of the train.
:
The helicopter, in .8 hr, traveled the same distance that the train took 1.8 hr
time varies inversely to the speed
let t = the train's speed =
cross multiply
1.8t = .8*225
1.8t = 180
t = 180/1.8
t = 100 km/hr is the train
:
:
Check this by finding the distance of each, should be the same
.8*225 = 180 km
1.8*100 = 180 km
