Question
Before servicing, a car runs at a speed of 28 km/hr while after servicing, it runs at a speed of 56 km/h. After servicing the car covers a certain distance in 7 hours. How much time would the car have taken to cover the same distance when it was not serviced?
Solution
After servicing, Distance covered by the car = 56 × 7 = 392 km Required time taken = 392/28 = 14 hours
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