Question

The total surface area of a hemispherical solid having radius 7 cm is ______.

Options

• 462 cm²

• 294 cm²

• 588 cm²

• 154 cm²

Answer 1

The total surface area of a hemispherical solid having radius 7 cm is 462 cm².

Explanation:

Total surface area of hemisphere = 3πr²

= 3 × 227 × 7 × 7

= 462 cm²