Question

Find the circumference of a circle.whose diameter is 8.4cm(take π=22/7)

Answer 1

circumference of circle =2πr * so, 2×22/7×8.4÷2 and now solve it 44/7×4.2=44×0.6**==2.84cm

Answer 2

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$diameter \: of \: circle \: = 8.4cm \\ so \: radius \: of \: circle \: = 4.2cm \\ \\ circumference \: of \: circle \: = 2\pi \: r \\ = > 2( \frac{22}{7} )4.2 \\ = > 2(22)(0.6) \\ = > 44(0.6) \\ = > 26.4 \\ \\ so \: circumference \: of \: circle \: is \: 26.4cm$
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