Question

Find the total surface area of a closed cylinder whose radius 5cm and height is 21cm

Answer 1

Question :-

Find the total surface area of a closed cylinder whose radius 5cm and height is 21cm.

Given :-

• Radius of the cylinder = 5cm
• Height of the cylinder = 21cm

Aim :-

• To find the Total Surface Area of the cylinder (T.S.A)

Formula to use :-

Total surface area of cylinder = $2\pi rh + 2\pi r^{2} = 2\pi r(h+r)$

Substituting the values,

=> $2 \times \dfrac{22}{7} \times 5(21+5)$

=> $\dfrac{220}{7} (26)$

=> $\dfrac{5720}{7}$

Hence,

T.S.A = $\dfrac{5720}{7}cm^{2}$ (or) 817.143cm²

Hope it helps!

Have a great day!

Answer 2

Step-by-step explanation:

Surface area of a closed cylinder= 2πrh

or, 2× 22/7×5×21

= 660cm² ans