WAEC - Mathematics (1995 - No. 23)
A cylindrical container, closed at both ends, has a radius of 7cm and height 5cm [Take π = 22/7]
Find the total surface area of the container
35cm3
154cm3
220cm2
528cm2
770cm2
설명
T.S.A of a cylinder = \(2\pi r^2 + 2\pi rh\)
= \(2\pi r(r + h)\)
= \(2 \times \frac{22}{7} \times 7 \times (7 + 5)\)
= \(44 \times 12\)
= \(528 cm^2\)