Question

a rectangular piece of paper of dimensions 20 cm into 14 cm is rolled along the blood to form a cylinder find the radius of the base of the cylinder so formed

Answer 1

on rolling length is=20cm

And,the circumference of circle=14cm

$2\pi \: r = 14$
$2 \times 22 \div 7 = 14$
$44 r \div 7 = 14$
$r = 14 \times 7 \div 44$
so , r=88cm

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