Question

4. Find the total surface area of a right circular cylinder whose radius is equal to 7
m and height is equal to 21 m.
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Answer 1

Answer:

total surface area = 1,232 sq. cm

Step-by-step explanation:

total surface area = area of curved surface + area of circular face

total surface area  =2πr* h + 2*π$r^{2}$

                              = 2$\pi$r (h + r)

                              = 2 * 22/7 * 7 (21 + 7)

                              = 2 x 22 x 28

                              = 1,232 sq. cm

Answer 2

Answer:

Given:

Height-21m

Radius-7m

Total surface area of right circular cylinder-2πr(r+h)

Substituting the values we get:

2*22/7*7 (7+21)

44*28

1232m^2