“Calculate the curved surface area of a hemisphere with radius 7 cm:”

"The curved surface area of a hemisphere with radius 7 cm is calculated using the formula 2πr². Substituting r = 7 gives 2 × π × 7² = 2 × π × 49 ≈ 308 cm² (using π ≈ 3.14). This formula accounts for the hemisphere’s outer surface excluding the base. Understanding this calculation is essential in geometry for analyzing three-dimensional shapes applied in engineering and design for precise measurements."