Question

find the surface area of cylinder whose radius=3m and height=4m​

Answer 1

GIVEN :-

• Height ( h ) = 4 m.
• Radius ( r ) = 3 m.

TO FIND :-

• Surface area of cylinder.

SOLUTION :-

As we know that,

$\\ : \implies \displaystyle \sf \: surface \: area = 2\pi rh + 2\pi r^{2}$

$: \implies \displaystyle \sf \: surface \: area = 2 \times \frac{22}{7} \times 3 \times 4 + 2 \times \frac{22}{7} \times (3) ^{2}$

$: \implies \displaystyle \sf \: surface \: area = \frac{44}{7} \times 12 + \frac{44}{7} \times 9$

$: \implies \displaystyle \sf \: surface \: area = \frac{528}{7} + \frac{396}{7}$

$: \implies \displaystyle \sf \: surface \: area = \frac{528+ 396}{7}$

$: \implies \displaystyle \sf \: surface \: area = \frac{924}{7}$

$: \implies \underline { \boxed{\displaystyle \sf \: surface \: area = 132\: m ^{2} }}$

Hence the surface area of the cylinder is 132 m².

Answer 2

Answer:

528 Meter Square

Step-by-step explanation:

TSA= 2Πrh (h+r)

Here,

Height= 4m

Radius= 3m

Therefore,

• 2 × 22/7 × 3×4 (3+4)
• 24 × 22/7 × 7
• 24 × 22
• 528 Meter Square.