Whish a certain journey in 15 hours at the speed of 42 km/hr. In order to cover the same distance in 6 hours, the speed of the car must be increased by:
Ops: A. 63 km/hr
B. 54 km/hr
C. 42 km/hr
D. 48 km/hr
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Answer:
(C) 54km/hr because I the certain journey in 15 hrs
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