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प्रश्न
The circumference o a garden roller is 280cm. How many revolutions does it make in moving 490m?
उत्तर
The Circumference of a Circle
= 280cm
= 2.8m
Number of revolutions
= `"Total distance moved"/"CIrcumference of Circle"`
= `(490)/(2.8)`
= 175.
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