A pharmaceutical capsule is shaped like a right circular cylinder of radius 0.4 cm and height 1.5 cm. Find the total surface area assuming flat ends.
Show answer & explanation
Correct answer: B
Explanation
Given:
Radius = 0.4 cm
Height = 1.5 cm
According to the formula:
Total Surface Area = 2πrh + 2πr²
2πrh = 2 × π × 0.4 × 1.5 = 1.2π
2πr² = 2 × π × (0.4)²
= 2 × π × 0.16
= 0.32π
Total Surface Area = 1.2π + 0.32π = 1.52π
= 1.52 × 3.14
= 4.77 cm²