Question

Hey you all please answer it.......

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1. Find the circumference of a circle whose radious is.

a. 28 cm
b.10.5cm
c.3.5 cm​

Answer 1

a) 2×22/7×28= 176cm

b) 2×22/7×10.5= 66cm

c) 2×22/7×3.5= 22cm

Answer 2

$formula \: of \: circumference \: = 2\pi \: r \\ 1. \: 2 \times \frac{22}{7} \times 28 \\ = 176cm\: \\ \\ 2. \: 2 \times \frac{22}{7} \times 10.5 \\ = 66cm \\ 3. \: 2 + \frac{22}{7} \times 3.5 \\ = 22cm$