Question

find the circumference if diameter is 42 cm. class 7th​

Answer 1

Answer:

circumference = 2 × 22/7 × 21 cm = 132 cm answer.

Answer 2

$We \: know \: that \: \\ circumference \: = 2\pi \: r \\ = 2\pi \: \frac{d}{2} \\ = 2 \times \frac{22}{7} \times \frac{42}{2} \\ = 22 \times 6 \\ = 132cm$

Hope this will help you!!