Question

arun observes that a train crosses a pole in 20s. the train travels at a speed of 72kmph. what is the length of the train(in m)​

Answer 1

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Answer 2

Answer:

answer is 400m

Step-by-step explanation:

$time = 20sec \\ speed = 72km/h \\ \: \: \: \: \: \: \: \: \: \: \: \: = 72 \times \frac{5}{18} \\ \: \: \: \: \: \: \: \: \: = 20m/s \\ distance = ? \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \ \\ distance = speed \times time \\ \: \: \: \: \: \: \: \ = 20 \times 20 \\ \blue{ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 400m \: \ {\mathtt{ans}}}$

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