Question

The diameter of a cylinder is 28 cm and its height is 40 cm . Find the curved surface area , total surface area and the volume of the cylinder.​

Answer 1

Answer:

cylinder area =πR²H

so substitute radius and height in it

3.14×14²×40

=24617.6

volume = 24617.6

Answer 2

$\bold{ \underbrace{ \red{Question}}}$

The diameter of a cylinder is 28 cm and its height is 40 cm . Find the curved surface area , total surface area and the volume of the cylinder.

$\bold{ \underbrace{ \red{Solution}}}$

Given :-

• Diameter of cylinder = 28cm
• Height of cylinder = 40cm

ⅰ) Find the curved surface area ?

sol. → We know that CSA of cylinder is 2πrh

$∴ \: 2 \times \frac{22}{7} \times 14 \times 40$

$= 88 \times 40 = 3520cm {}^{2}$

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ⅱ) Total surface area ?

Sol. → we know that TSA of cylinder is 2πr (h + r)

$∴ \: 2 \times \frac{22}{7} \times 14 \: (14 + 40)$

$88(54) = 88 \times 54$

$= 4752cm {}^{2}$

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ⅲ) The volume of the cylinder. ?

Sol. → We know that volume of cylinder is πr2h

$∴ \frac{22}{7} \times 14 \times 14 \times 40$

$= 44 \times 14 \times 40$

$= 24640cm3$

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