Question

A 280 m. long train is moving at a speed of 60 kmph.
What is the time taken by the train to cross a bridge
320 m. long?
(A) 36 sec.
(C) 30 sec.
(B) 32 sec.
(D) 40 sec.​

Answer 1

make me bràinlest

36 sec

Answer 2

Answer.60 kmph=16.6m/s

60 kmph=16.6m/sthe length of the train =280m

60 kmph=16.6m/sthe length of the train =280mlength of the tunnel=220m

60 kmph=16.6m/sthe length of the train =280mlength of the tunnel=220mnow total distance=length of train + length of tunnel

60 kmph=16.6m/sthe length of the train =280mlength of the tunnel=220mnow total distance=length of train + length of tunnel                              =280+228=500

60 kmph=16.6m/sthe length of the train =280mlength of the tunnel=220mnow total distance=length of train + length of tunnel                              =280+228=500velocity=distance/time

60 kmph=16.6m/sthe length of the train =280mlength of the tunnel=220mnow total distance=length of train + length of tunnel                              =280+228=500velocity=distance/timetime=distance/velocity

60 kmph=16.6m/sthe length of the train =280mlength of the tunnel=220mnow total distance=length of train + length of tunnel                              =280+228=500velocity=distance/timetime=distance/velocitytime = 500/16.6

60 kmph=16.6m/sthe length of the train =280mlength of the tunnel=220mnow total distance=length of train + length of tunnel                              =280+228=500velocity=distance/timetime=distance/velocitytime = 500/16.6=30.120s

60 kmph=16.6m/sthe length of the train =280mlength of the tunnel=220mnow total distance=length of train + length of tunnel                              =280+228=500velocity=distance/timetime=distance/velocitytime = 500/16.6=30.120s=30(aprox)