Question

if the diameter of the wheel of the car is 84cm. find the number of revolution will have to make it to travel the distance of 13.2 km

Answer 1

Diameter of wheel = 84 cm

Radius of wheel = 42 cm

Circumference of wheel = 2 pi r

= 2 × 22 × 42 / 7

= 44 × 6

= 264 cm

= 2.64 m

Distance to be travelled = 13.2 km = 13200 m

Number of revolution = Total distance / Circumference of wheel

= 13200 / 2.64

= 1320000 / 264

= 10000 / 2

= 5000

Answer 2

radius =42 cm
circumference of wheel=2×22/7×42
=44×6=264cm
now distance =13.2km
so..
13.2km=13200m=1320000cm
now divide
distance by circumference
1320000/264=5000
or 5000 rounds
may it helps u