Question

A train crosses an electric pole in 5sec and a railway bridge of 600m long in 35 sec. Find the speed of train in km/hr and length of the train!!
please help me wid this!!

Answer 1

Answer:

एक गुणिले एक किती होतास आम्हाला एका वाक्यात सांगा

Answer 2

Answer:

Step-by-step explanation:

hi dear friend,i will try my best to answer this properly.

the train crosses an electric pole in 5sec

so that means,it is the time required for the entire train to cross this pole

that is,if the front part of the train crosses the pole at a particular time,then only after 5 sec,the rear part crosses the pole,so that means :

length of the train=velocity of the train×5(equation 1)

now the second case is the railway bridge,unlike the electric pole,railway  bridge is 600m long,so here,we take the starting time as when the front part of the train just starts crossing the railway bridge,so that means the rear part has to cover a distance equal to length of the railway bridge+length of the train,for the entire train to cross the railway bridge.

so that means 600+length of the train=velocity of the train×35(equation 2)

substituting equation 1 in equation 2

let us the take the velocity of the train to be v for simplicity.

we get 600+5v=35v⇒v=20m/s=20×18/5 km/h= 72km/h

so length of the train=5v=5×20=100m=0.1km

hope this helps you bro,pls follow

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