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?
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Answer 1

Step-by-step explanation:

distance = 120 km

time = 2hr 30 min

speed = distance /time

=(120/5/2)km/hr

= 120 x 2/5

= 48 km/hr

now time = (2 hr 30 min - 30 min)

= 2 hr

speed = distance/time

= (120/2) km/hr

= 60 km/hr..