Question

The surface area, SA of a right circular cone is SA = πr2 + πrs, where r is the radius of the circular cone and s is the slant height. Using rounding to the nearest whole number, which of the following is an estimate of the volume of a cynlinder with a radius of 4.42 meters and a slant height of 2.61 meters?

Answer 1

84 m squared

Explanation:

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Answer 2

84 m^2

Explanation:

SA = πr^2 + πrs

r = 4.42 rounding to the nearest whole number = 4

s = 2.61 rounding to the nearest whole number = 3

pi = 3.14 rounding to the nearest whole number = 3

SA = 3 * 4^2 + 3 * 4*3

= 3 *16+ 12*3

= 48+ 36

= 84 m^2