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A train completely passes a 200-m-long tunnel in 36 seconds and a pole in 20 seconds. How much time (in hours) will it take to cover a dist…

3007Medium DSSSB TGT Computer Science 0 replies 1 views

A train completely passes a 200-m-long tunnel in 36 seconds and a pole in 20 seconds. How much time (in hours) will it take to cover a distance of 333 km?

A6.7
B7.5
C7.4
D6.9

Correct answer: C

Explanation

Let the train length be L. (L + 200)/36 = L/20 gives L = 250 m, so the speed is 250/20 = 12.5 m/s = 45 km/h. Time for 333 km = 333/45 = 7.4 hours.

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