Question 149

A 240-metre long train running at the speed of 60 kmph will take how much time to cross another 270-metre long train running in opposite direction at the speed of 48 kmph?

Solution

Length of first train = 240 m and second train = 270 m

Total length of the two trains = 240 + 270 = 510 m

Speed of first train = 60 kmph and second train = 48 kmph

Since, the trains are moving in opposite direction, thus relative speed = 60 + 48 = 108 kmph

= $$(108 \times \frac{5}{18})$$ m/s = $$30$$ m/s

Let time taken = $$t$$ seconds

Using, time = distance/speed

=> $$t=\frac{510}{30}=17$$ seconds

=> Ans - (A)

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