Question

Radius of the wheel shown below is 7cm. How many rotations are needed for this wheel to cover 440 cm?​

Answer 1

$\sf{radius \: of \: circle = 7 \: cm}$

$\green{ \boxed{ \sf{circumference \: of \: circle = 2\pi r}}}$

$\: \: \: \: \: \: \: \: \: : ⟹ \: \: \: \: 2 \times \frac{22}{7} \times 7$

$\: \: \: \: \: \: \: \: \: \: \: \: \: : ⟹ \: \: \: \: \: \: \: \sf {44 \: cm }$

$\: \: \: \: \: \: \sf{no. \: of \: rotations = \: \frac{440}{44} }$

$\: \: \: \: \: \: \: \: : ⟹ \: \: \: \sf{ 10 \: revolution} \:$

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