Question

A train 150 metres long crosses a milestone in 15
seconds and crosses another train of the same
length travelling in the opposite direction in 12
seconds. The speed of the seconds train in km/hr is
52
56
C54
D
58​

Answer 1

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Answer 2

Answer:

option(c) => 54

Step-by-step explanation:

speed of the first train $=\frac{150}{15} =10 m/s$

time taken by trains to cross each other = 12sec.

and Relative speed of two trains   =  $\frac{150 +150}{12}$ =  25 m/s

∴ Speed of the second train  = (25 − 10) × $\frac{18}{5}$ = 54 km/hr.

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