Latest Microsoft Aptitude Question SOLUTION: One train leaves Los Angeles at 15mph heading for New York. Another train leaves from New York at 20mph heading for Los Angeles on the same track. If a bird, flying at 25mph, leave

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One train leaves Los Angeles at 15mph heading for New York. Another train leaves from New York at 20mph heading for Los Angeles on the same track. If a bird, flying at 25mph, leaves from Los Angeles at the same time as the train and flies back and forth between the two trains until they collide, how far will the bird have traveled?

Solution

This is an infinite round problem means the bird will complete infinite rounds in this manner now for finding the total distance traveled by the bird let us consider the total distance between the two given stations as L. Here since the distance between these two stations is not given so answer will be in terms of L.
speed of the two trains moving in opposite directions are 15 mph and 20 mph.
so time taken for the collision between the trains will be L/(15+20) = L/35
In this much time the bird will move 25*L/35 miles = 5L/7 miles

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Asked In Microsoft (14 years ago)

Solved Read Solution (2)

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Vadivelan M  (14 years ago)

distance between those two stations = 2800
35T = 2800 -> T = 80 hours
so 80*25 = 2000. Hence the bird travelled 2000 miles.

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Vadivelan M  (14 years ago)

2800 miles

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