Question

a wheel of circumference 60cm makes 70 revolutions per sec how long will it take to cover 6.3 km

Answer 1

DISTANCE TRAVELLED IN 1SECOND =70*60/100000KM

TIME TAKEN TO TRAVELL 1 KM=100000/70*60

                                             6.3KM=100000/70*60******6.3

                                                        =150SECONDS