Question

solve any 5 sub question 1] Radius of base 7cm of cylinder and its hight 10cm. Then find its curved surface area.​

Answer 1

Answer:

Curved surface area of cylinder = 2πrh

Here r = 7 cm

Height = 10 cm

Now,

C.S.A of cylinder = 2×7×10×22/7

= 440 cm²

HOPE IT HELPS YOU.

Answer 2

Question :

• Radius of base 7cm of cylinder and its height 10cm. Then find its curved surface area.

Given :

• Radius of Cylinder (r) = 7cm
• Height of Cylinder (h) = 10cm

To Find :

• Curved Surface Area of Cylinder

Solution :

✰ As we know that, Curved Surface Area of Cylinder is given by 2πrh . Now in this question Radius and Height of the Cylinder are given, so simply we will put the given values in the formula to find the Curved Surface Area of Cylinder (CSA).

⠀⠀⠀

⠀⠀⠀⟼⠀⠀⠀CSA = 2πrh

⠀⠀⠀⟼⠀⠀⠀CSA = 2 × 22/7 × 7 × 10

⠀⠀⠀⟼⠀⠀⠀CSA = 2 × 22 × 10

⠀⠀⠀⟼⠀⠀⠀CSA = 44 × 10

⠀⠀⠀⟼⠀⠀⠀CSA = 440cm²

⠀

Thus Curved Surface Area of Cylinder is 440cm²

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What if we need Total Surface Area also ?

⠀⠀⠀⟼⠀⠀⠀TSA = 2πr (h + r)

⠀⠀⠀⟼⠀⠀⠀TSA = 2 × 22/7 × 7 (10 + 7)

⠀⠀⠀⟼⠀⠀⠀TSA = 2 × 22 × (10 + 7)

⠀⠀⠀⟼⠀⠀⠀TSA = 2 × 22 × 17

⠀⠀⠀⟼⠀⠀⠀TSA = 44 × 17

⠀⠀⠀⟼⠀⠀⠀TSA = 238cm²

⠀

Thus Total Surface Area of Cylinder is 238cm²

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$\small\boxed{\begin{array}{cc}\large \red{\boxed{\sf\dag \: \blue{\underline \green{Formulae \: Related \: to \: Cylinder :}}}} \\ \\ \bigstar \: \sf Area\:of\:Base\:and\:top =\pi r^2 \\ \\\bigstar \: \sf Curved \: Surface \: Area =2 \pi rh \\ \\ \bigstar \: \sf Total \: Surface \: Area = 2 \pi r(h + r) \\ \\ \bigstar \: \sf Volume=\pi r^2h \end{array}}$