Find the total surface area (in cm²) of a hemisphere of radius 7 cm. (Use π = 22/7)

462. Total surface area of a hemisphere = 3πr² = 3 × (22/7) × 7² = 3 × 22 × 7 = 462 cm².

Find the total surface area (in $cm^{2}$ ) of a hemisphere of radius 7 cm. (Use π = 22/7)

Competition practiceAreas & Volumes

Total surface area of a hemisphere = 3π

r^{2} = 3 \times (22/7) \times 7^{2} = 3 \times 22 \times 7 = 462 cm^{2}

Answer: C) 462

Don't just memorise the answer — build a daily practice habit.