Question

Two trains for palwal leave kanpur at 10a.m and 10:30 am and travel at the speeds of 60 kmph and 75 kmph respectively. after how many kilometres from kanpur will the two trains be together? ans: 150 km

Answer 1

Well, the question is very easy to solve. You need to take a bit help of linear scaling system.

Let's assume the two trains be A and B.

For train A:

Speed = 60km/hr i.e. In 60km in 1 hr and 30km in 30 mins.
At 10:00 am = Distance covered is 0km.
At 10:30 am = Distance covered is 30km.
At 11:00 am = Distance covered is 60km.
At 11:30 am = Distance covered is 90km.
At 12:00 pm = Distance covered is 120km.
At 12:30 pm = Distance covered is 150km.

Similarly For train B:

Speed = 75km/hr i.e. In 75km in 1 hr and 37.5km in 30 mins.
At 10:30 am = Distance covered is 0km.
At 11:00 am = Distance covered is 37.5km.
At 11:30 am = Distance covered is 75km.
At 12:00 pm = Distance covered is 112.5km.
At 12:30 pm = Distance covered is 150km.


Therefore, both the trains meet at 12:30 pm and after traveling 150km.

Answer 2

Answer:

150 km

Step-by-step explanation:

let x be the time

(60/(x-3)) = 75/(x)

on solving x we got x as 150 km

from this u can also find out the timing :150 km / 75 kmph =2 hr

2 hrs from 10:30 i.e 12.30 both trains meet each other