Question

α trαín ís runníng αt α spєєd σf 84km/hr crσssєs αn єlєctríc pσlє ín 9 sєc. thє lєngth σf thє trαín ís


let Ayush bro answer.​

Answer 1

Explanation:

Let length of train = l metre

Time =\( \Large \frac{Distance}{ Relative speed in opp. direction } \)

4 sec=\( \Large \frac{l+0}{ \left(84+6\right) \times \frac{5}{18} m/s} \)

4 =\( \Large \frac{l}{ 90 \times \frac{5}{18} } \)

l=100 m

Therefore, length of the train = 100 m