Question

Two buses are moving in opposite directions with velocities of 36 km/hr and 108

km/hr. Find the distance between them after 20 minutes.

Answer 1

Step-by-step explanation:

It is given that,

Speed of bus 1 is 36 km/h and speed of bus 2 is 108 km/h. We need to find the distance between bus 1 and 2 after 20 minutes.

Time = 20 minutes =
`(20)/(60)\ h=(1)/(3)\ h`

As the buses are moving in opposite direction, then the concept of relative velocity is used. So,

Distance,
`d=v* t`

v is relative velocity, v = 108 + 36 = 144 km/h

So,

`d=144\ km/h * (1)/(3)\ h\\\\d=48\ km`

So, the distance between them is 48 km after 20 minutes.