the distance between two places is 120km. 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:
60 km/hr
Step-by-step explanation:
A------------------------B
120 km
avg. speed = total distance/total time
120 km/2.5 hr
= 48 km/hr
now,
time 2 hr
distance 120 km
so, avg speed = 60 km/hr
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