Question

The surface area of a sphere is 616 cm². Its diameter is ______.

Options

• 3.5 cm

• 7 cm

• 10.5 cm

• 14 cm

Answer 1

The surface area of a sphere is 616 cm². Its diameter is 14 cm.

Explanation:

The surface area of a sphere is given by the formula A = 4πr2. Substituting the values, 616 = 4 × 22/7 × r^2,

which simplifies to r² = 49, giving a radius (r) of 7cm. Therefore, the diameter of the sphere is 2r = 2 × 7 = 14.