Question

A train 180 m long is running at a
speed of 42 km/hr. In what time it
crosses a man going at a speed of
6 km/hr in the same direction?
(a) 11 seconds (b) 21 seconds
(c) 23 seconds (d) 18 seconds​

Answer 1

$\huge \bold \green{QUESTION}$

A train 180 m long is running at a

speed of 42 km/hr. In what time it

crosses a man going at a speed of

6 km/hr in the same direction?

$\huge \bold \green{Answer}$

$\underline \bold \pink{given} : speed \: of \: train \: 48kmph \\ \circ \: {walking \: speed} = 6kmph \\ so \: \\ relative \: speed \: =( 48 + 6) = 54 \times \frac{5}{18} m \: per \: sec$

length of train given = 180 m

time taken by train to pass the walking man = 180/15 = 12 sec

Answer 2

Step-by-step explanation:

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