Question

The radius of a driving wheel of a car is 100cm. then to keep speed 60 km/hr. how many approx revolution per min must wheel make

Answer 1

heya...!!!


given that:-

radius = 100cm

circumference = 2πr

=> 2×22/7×100

=> 44/7 × 100

=> 4400/7 cm


now,


Distance covered by the wheel in one minute

=> (60 × 1000 × 100)/60 = 100000cm


Number of revolutions in one minute 

=> 100000/4400/7

=> 700000/4400

=> 159.09(approx.)