A bottle is made by attaching a hemisphere to a cylinder of the same radius. Radius = 3.5 cm, height of cylinder = 10 cm.
Find the total surface area of the bottle.
Show answer & explanation
Correct answer: C
Explanation
Given:
r = 3.5 cm, h = 10 cm
Curved surface area of the cylinder = 2πrh = 2 × 22/7 × 3.5 × 10= 220 cm²
Curved surface area of the hemisphere = 2πr²
= 2 × 22/7 × 3.5 × 3.5= 77 cm²
Therefore, total surface area = 220 + 77 = 297 cm²