Question

4.
The circumference of the base of a cylinder is 176 cm and its height is 65 cm. Find
its lateral surface area.
so​

Answer 1

Answer:

Given circumference of the base of cylinder = 176 cm

That is 2πr = 176

height of cylinder, h = 65 cm

LSA of cylinder = 2πrh

= 176 x 65

= 11440 cu cm

Answer 2

⠀$\underline{\underline{\blue{\textbf{Step - By - Step - Explanation : -}}}}$

To Find :

• Lateral Surface Area

Solution :

• The circumference of base of a cylinder is 176 cm
• height of cylinder = 65 cm

$\boxed{\underline{\green{\textbf{Circumference of circle = 2πr}}}}$

›› 2πr = 176

›› 2 × 22/7 × r = 176

›› 44/7 × r = 176

›› r = 176 × 7/44

›› r = 4 × 7

›› r = 28 cm

$\boxed{\underline{\green{\textbf{LSA of Cylinder = 2πrh}}}}$

›› LSA of cylinder = 2 × 22/7 × 28 × 65

›› LSA of cylinder = 44 × 4 × 65

›› LSA of cylinder = 176 × 65

›› LSA of cylinder = 11440

$\large\dag \large { \red{\underline{\bf{Hence }}}}$

$\orange{\textrm{Lateral surface Area of cylinder = 11440 cm²}}$

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