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प्रश्न
The diameter of a wheel is 84 cm. How many revolutions will it make to cover 792 m?
पर्याय
200
250
300
350
उत्तर
300
Let d cm be the diameter of the wheel.
We know:
Circumference of the wheel = π × d
`=(22/7xx84)`
= 264 cm
Now,
Number of revolutions to cover 792 m `= ((792xx1000)/264)`
= 300
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