Question

18. If the radius of a cylinder is 4cm and height is 14cm, then the curved surface area of a
cylinder is:
(A) 440 sq.cm
(B) 352 sq.cm
(C) 400 sq.cm
(D) 412 sq.cm​

Answer 1

Answer:

352 sq.cm

Step-by-step explanation:

CSA of a cylinder = 2×22÷7×14×4

= 352 sq.cm

Answer 2

Given :

⬤ Radius of Cylinder is 4 cm.

⬤ Height of Cylinder is 14 cm.

To Find :

⬤ Curved Surface Area of Cylinder.

Formula Used :

$\bf[\:{Curved \: Surface \: Area \: of \: Cylinder = 2\pi{r}h}\:]$

• r = radius
• h = height

Solution :

According to the Formula :-

2πrh

2 × 22/7 × 4 × 14

2 × 22 × 4 × 2

44 × 4 × 2

352

Therefore , Curved Surface Area of Cylinder is 352 cm².

Option (B) 352 cm² is Correct.

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Related Formulas :-

• Curved surface area of Cylinder = 2πrh
• TotalSurface Area of Cylinder = 2πr (r + h)
• Volume of Cylinder = πr²h
• Total Surface Area of Cube = 6a²
• Volume of a Cube = a³

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