Two trains travel in opposite directions at 36 kmph

Asked by admin @ 20/08/2021 in Physics viewed by 267 People

Two trains travel in opposite directions at 36 kmph and 45 kmph and a man sitting in slower train passes the faster train in 8 seconds. The length (in m) of the faster train is:

Answered by admin @ 20/08/2021

Relative velocity = 36+45 = 81 kmph
time = 8 seconds
distance = velocity × time

$distance = 81 \times \frac{5}{18} \times 8$
$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: =180 \: meters$
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