Infosys Company Numerical Ability Time Distance and Speed

A Boy has taken a short cut on which there is a railway track that goes through a narrow bridge. When the boy covered 7/16th of the track in the bridge, he heard the whistle of the train. Then he ran out of that bridge, when the train came to that bridge. If he were taken actual root, he would have reached the destination on time, rather taking the shortcut and running out of that bridge. If the boy covers 4km/hr, what was the speed of the train?

Read Solution (Total 1)

64/9 kms/hr

If x is total length of bridge, the time taken by boy to travel 9/16 x is equal to time taken by travel distance x.
if T is speed of train, then
x*(9/16)/4 = x/T

so T = 64/9 kmph
13 years agoHelpfull: Yes(0) No(0)

Infosys Other Question

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