Question

radius of base of a cylinder is 7 cm and height is 10 cm then find the curved surface area of the cylinder

Answer 1

Given

Radius of base =7cm

Height =10cm

$curved \: surface \: area \: of \: cylinder = 2\pi \: r \: h$

$= 2 \times \frac{22}{7} \times 7 \times 10$

=2x22x10

=440cm²

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Answer 2

CSA of cylinder = 2$\pi$rh

radius=7cm

height=10cm

therefore,

2×$\frac{22}{7}$×7×10

=2×22×10 (by cancelling denominator 7 by the radius)

=44×10

=440 cm²