Question

Find circumference of circle whose radius is 4.2cm

Answer 1

$\sf Circumference = 2\pi \: r \\ = 2 \times \frac{22}{7} \times 4.2 \\ = \sf \: 26.4 \: cm$

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Answer 2

Answer:

Find circumference of circle whose radius is 4.2cm

circumference of circle = 2TT r

= 2× 22/7×4.2

= 2×22×0.6

= 44×0.6

=26.4