A scooter runs at a speed of 49 km/hr after repairing and runs at 42 km/hr before repairing. It covers a certain distance in 7 hours after repairing. How much time will it take to cover twice of the distance before repairing?
Speed after repairing = 49 km/hr and time taken = 7 hours
=> Distance covered after repairing = $$49\times7=343$$ km
Time taken to cover twice of the distance before repairing = $$\frac{343\times2}{42}=\frac{49}{3}=(16+\frac{1}{3})$$ hours
=Â 16 hours 20 mins
=> Ans - (C)
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