Question

Find the volume of a hemisphere whose diameter is 7 cm. (Take ∏ = 22/7) (Rounded up to two decimal places)

• A. 89.83 cm³
• B. 94.83 cm³
• C. 99.83 cm³
• D. 84.83 cm³

Answer 1

Answer:

A. 89.83 cm³

Radius $( r = \frac{7}{2} = 3.5 ) cm$

Volume of hemisphere:

$V = \frac{2}{3}\pi r^3$

$= \frac{2}{3} \times \frac{22}{7} \times (3.5)^3$

$(3.5)^3 = 42.875$

$V = \frac{2}{3} \times \frac{22}{7} \times 42.875$

$\frac{22}{7} \times 42.875 = 134.75$

$V = \frac{2}{3} \times 134.75 = 89.83$

Final Answer: 89.83 cm³