Question

how many times a wheel of radius 21cm must rotate to cover a distance of 528m only ​

Answer 1

Answer:

400 rotations

Step-by-step explanation:

Distance in one rotation = wheel circumference C

C = 2×pi×r

r = 21/100 = 0.21 m

C = 2 × 22/7 × 0.21 = 1.32 m

No. of rotations = 528/1.32 = 400