Question

the radius of a whell os 21cm how many revolution will it make to cover a distance of 6600m​

Answer 1

Step-by-step explanation:

radius = 21 cm

circumference = 2πr

= 2 × (22÷ 7) × 21

= 132 cm

No. of revolutions = Distance ÷

circumference

= 6600 ÷ 132

= 50 revolutions

Answer 2

Answer:

Number of Revolutions=5000

Step-by-step explanation:

Given:

Distance=6600m=660000cm

Radius=21cm

Required to find:

Number of revolutions=n

Formula:

(Circumference)×(no of revolutions)=Distance

Solution:

(2πr)×(n)=660000

(2×22/7×21)×n=660000

n=5000

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