WAEC - Mathematics (2022 - No. 39)
Find the volume of a cone of radius 3.5cm and vertical height 12cm. [Take π = 22/7]
15.5cm\(^3\)
21.0cm\(^3\)
142cm\(^3\)
154cm\(^3\)
Penjelasan
volume of a cone = ⅓ π r2h → \(\frac{1*22*3.5*3.5*12}{3*7}\)
= 154cm\(^3\)