Question

17. The base radius and height of a right circular cylinder are 14 cm and 5 cm
respectively. Its curved surface is
220 cm2
O 440 cm2
O 1232 cm2
21 x 14 x (14 + 5) cm2
Required

Answer 1

Answer -

Option 2

Given -

• Height of cylinder is 5 cm

• Base radius of cylinder is 14 cm

To find -

• Curved surface area of cylinder

Formula used -

• Curved surface area of cylinder

Solution -

In the question, we are given with the height + base radius of a cylinder, and we need to find it's curved surface area, for that, we will use the formula of curved surface area of cylinder, will cancel out one or more value(s), and then we will obtain our answer. Let's do it !

Curved surface area of Cylinder -

• $\sf \: 2\pi rh$

Where -

• r = Radius

• h = Height

• π = 22/7

On substituting the values -

$\sf \longrightarrow\: CSA \: = 2\pi rh \\ \\ \sf \longrightarrow \: CSA \: = 2 \: \times \: \dfrac{22}{ \cancel{7}} \: \times \: {\cancel{14}} \: \times \: 5 \\ \\ \sf \longrightarrow \: CSA \: = 2 \: \times \: 22 \: \times 2 \: \times \: 5 \\ \\ \sf \longrightarrow \: CSA \: = 88 \: \times \: 5 \\ \\ {\boxed {\longrightarrow {\sf {\: CSA \: = 440 { \: cm}^{2}}}}}$

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Answer 2

Answer:

Given :-

Radii of cylinder = 14 cm

Height = 5 cm

To Find :-

CSA

Solution :-

We know that

CSA = 2πrh

CSA = 2 × 22/7 × 14 × 5

CSA = 44/7 × 14 × 5

CSA = 44 × 2 × 5

CSA = 44 × 10

CSA = 440 cm²