Question

7. The distance between two places is 120 km. A car travelling at a certain speed can cover the
distance in 2 hours 30 minutes. By how many km/h should the speed of the car be
increased for it to take 30 minutes less to cover the distance.​

Answer 1

Step-by-step explanation:

S=120km,t1=2+1/2=5/2 hours

V1=120/5/2=240/5=48km/h

V2=120/2=60km/h

Increase in velocity is v2-v1=60–48 = 12km/h