Question

How many times a wheel of radius 21 cm must rotate to go 396 cm?
with explanation
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Answer 1

ANSWER.

the radius of a wheel is 21 cm, then find how many times it should rotate to cover a distance of 264 m. <br> (A) The circumference of the wheel

(given r = 21 cm) <br> (C)

The circumference of the wheel = 132 cm <br> (C)

<br> (D) Number of rotatins <br>

<br> (It is given that distance = 264 m and circumference = 132 cm)

Answer 2

Answer:

3 times

Step-by-step explanation:

Radius of wheel = 21cm

Perimeter = Circumference of wheel = 2πr = 2×22/7×21 = 132cm

Distance to cover = 396cm

Number of times the wheel should rotate to cover the distance = 396÷132

= 3 times

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