Question

How many times a wheel of radius $28cm$ must rotate to go $352cm$. (Take $\pi =3.14$)

Answer 1

Radius of the wheel$=28$cm

distance covered by the wheel in one rotation

$=2\times \pi \times r=2\times \frac{22}{7}\times 28$cm

$\therefore$ No. of times wheel must rotate to go $352$m

$=\frac{352cm}{2\pi rcm}=\frac{352\times 7}{2\times 22\times 28}=2$ times