Mathematics for IGCSE & O level - Mensuration (Section 10 - No. 25)
A cylinder has a radius of 4 cm and a height of 10 cm. What is its surface area?
351.9 cm²
351.6 cm²
288.3 cm²
320 cm²
解释
Surface Area = 2πr² + 2πrh = 2 * π * 4² + 2 * π * 4 * 10 ≈ 351.9 cm²