Question

1. If the radius of the base of the cylinder is
2.8 cm and its height to 5.5 cm, then find its
(i) Curved surface area
(ii) Total surface area​

Answer 1

Answer:

Hey buddy here's your answer Hope it helps you

Step-by-step explanation:

i) Csa of a cylinder is 2πrh = 2 x 22/7 x 2.8 x 5.5

= 96.8 cm²

ii) Tsa of a cylinder is 2πr(r+h) = 2 x 22/7 x 2.8 ( 2.8 + 5.5)

= 146.08 cm²

Answer 2

Step-by-step explanation:

{i} Curved surface area = 2πrh

= {2× 22/7×2.8×5.5} = 96.8 cm²

{ii} Total Surface Area = 2πrh+2πr² = 2πr{h+r}

= 2×22/7×2.8{2.8+5.5}

=17.6×8.3 = 146.08 cm²

Hope it Helps !