Question

Train X, traveling at a speed of 36 km/hr, crosses another train Y, which is moving in the opposite direction at a speed of 72 km/hr, in 't' seconds. If the ratio of the lengths of train X and train Y is 5:4, and train X crosses a pole in 40 seconds, find the value of (t + 11).

A 35
B 31
C 33.5
D 23
E 21
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