Question

Before servicing, a car runs at a speed of 45 km/hr while after servicing, it runs at a speed of 90 km/h. After servicing the car covers a certain distance in 4 hours. How much time would the car have taken to cover the same distance when it was not serviced?

A 8 hours
B 16 hours
C 12 hours
D 4 hours
E None of these
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