How many times a wheel of radius 21 cm must rotate to go 396 cm?
with explanation
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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)
Answered by
3
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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