The radius of a wheel is 3.5 cm. What is the distance (in cm) travelled by the wheel in 20 revolutions?
Circumference of wheel $$(r=3.5)$$ = $$2\pi r$$
= $$2\times\frac{22}{7}\times3.5=22$$ cm
Distance covered in 1 revolution = Circumference of wheel = $$22$$ cm
=> Distance covered in 20 revolutions = $$22\times20=440$$ cm
=> Ans - (B)
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