Mathematics for IGCSE & O level - Mensuration (Section 9 - No. 12)
A solid cone has a volume of 300 cm³. If the height of the cone is 10 cm, what is its base area?
90 cm²
45 cm²
60 cm²
30 cm²
คำอธิบาย
Volume of cone = 1/3 * base area * height. Base area = (3 * Volume) / height = (3 * 300) / 10 = 90 cm².