Question

The height of a cylinder is 6 inches. The diameter of the circular base of the figure is 10 inches.



What is the approximate surface area of the figure? Use 3.14 for π and round to the nearest whole number.

251 square inches
267 square inches
345 square inches
415 square inches

Answer 1

Surface area = 2πr^2 + 2πrh. Here r = 5 in, h = 6 in.

2πr^2 = 2(3.14)(25) = 157.0
2πrh = 2(3.14)(5)(6) = 188.4

Total ≈ 157.0 + 188.4 = 345.4 ≈ 345 square inches.

Answer: 345 square inches.