Question

the curved surface area of a cylinder of height 21cm is 132cm². Find the diameter of the base ​

Answer 1

Answer:

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Given :-

height :- 21cm

C.S.A. :- 132cm²

R.T.F. = the diameter of the base

curved surface area of a cylinder = 2πrh

$132 {cm}^{2} = 2 \times \frac{22}{7} \times r \times 21 \\132 {cm}^{2} = 2 \times \frac{22}{\cancel7} \times r \times \cancel21 \\ \\ r = \frac{132}{2 \times 22 \times 3} \\ r = 1cm \: \\ then \: diametre \: will \: be \: 2(r) = 2(1cm) \\ = 2cm$

therefore the diameter of the cylinder is 2cm

Answer 2

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Diameter of Cylinder = 2cm

Mark upper one Brainliest $\huge\color{red}♡$