the distance between two places 120 km a car travelling at a certain speed can cover the distance in 2 hr 30 min by how many km/h should the speed of the car be increased for it to take 30minutes less to cover the distance
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Step-by-step explanation:
Distance = 120 km
Speed = Distance / Time
= 120/25
= 48 km/hr
New Speed = 120/2
= 60 km/hr
Change in speed = 60-48
= 12 km/hr
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