Let wheel must be rotate n times of its circumference.
Radius of wheel = 28 cm and Total distance = 352 m = 35200 cm
∴ Distance covered by wheel = n x circumference of wheel
⇒ 35200 = nX2πr
⇒ 35200 = nx2x22/7×28
⇒ n = 35200×7/2×2228
⇒ n = 200 revolutions
Thus, wheel must rotate 200 times to go 352 m.

Class 7 Maths Chapter 11 Exercise 11.3

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