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1 .
A car runs at the speed of 40 when not serviced and runs at 65 kmph. when serviced. After servicing, the car covers a certain distance in 5 hours. How much $approximate$ time will the car take to cover the same distance when not serviced?
[ A ]    10
[ B ]    7
[ C ]    12
[ D ]    8 right
[ E ]    6
Answer : Option D
Explanation :
After sevicing, the distace covered in 5 hours = 65 $\times$ 5 = 325 km
Without servicing, speed = 40 km/h
Time = $Distance \over speed$ = $325 \over 40$ = 8 hours

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