Question

find the radius if circumference is 42 cm​

Answer 1

$\huge {\bold{ \underline{ \underline{ \blue{Answer}}}}} \implies$

circumference of circle 2πr

$2\pi r = 42 \\ 2 \times \frac{22}{7 } \times r = 42 \\ r = \frac{42 \times 7}{2 \times 22 } \\ r = \frac{21 \times 7}{22} \\ r = \boxed{6.6}$

Answer 2

answer:

circumference of circle is- 2πr

so,

2πr=42

2×22/7×r=42

44/7×r=42

r=↓

$42\times \frac{7}{44}$

answer will be 6.6cm

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