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** Q 2435145962. ** A group of friends are travelling from Bangalore to Mysore by car. They drive the car by rotation and the driver is interchanged every hour when they halt for refreshment. They cover a certain distance moving at a speed of 60 km/h. However after considering the halt for a fixed time every hour, its average comes out to be 50 km/h. For how much time will the car halt per hour?

**IBPS-CLERK 2017 Mains **