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प्रश्न
A wheel of a car covers a distance of 3520 cm in 20 rotations. Find the radius of the wheel?
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उत्तर
Distance covered by circular wheel in 20 rotation = 3520 cm
∴ Distance covered in rotation = `3520/20 "cm"` = 176 cm
∴ Circumference of the wheel = 176 cm
∴ 2πr = 176
`2 xx (-2)/6 xx "r"` = 176
r = `(176 xx 7)/(2 xx 22)`
r = 28 cm
Radius of the wheel = 28 cm
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