Question

Find the surface area of the cylinder use 3.14 for pi​

Answer 1

given :-

h = 4cm

r = 2cm

π = 3.14

therefore it's surface area = 2πr² + 2πrh

= (2 × 3.14 × 2 × 2) + (2 × 3.14 × 2 × 4)

= (8 × 3.14) + (16 × 3.14)

= 25.12 + 50.24

= 75.36cm²

hence, right option is the second one 75.36cm²

Answer 2

75.36 cm²

Explanation:

Data:

r = 2 cm

h = 4 cm

Calculation:

SA = 2πr² + 2πrh

= 2 × 3. 14 × 2² +2 × 3. 14 × 2 × 4

= 6.28 × 2 × 2 + 50.24

= 25.12 + 50.24

= 75.36 cm²

The surface area of the cylinder is 75.36 cm².