Question

Find the lateral surface area of the figure.

Answer 1

Surface area of the cylinder = 816.4 sq. ft.

Solution:

Height of the cylinder = 21 ft

Diameter of the cylinder = 10 ft

Radius of the cylinder = 10 ÷ 2 = 5 ft

Use the value of $\pi$ = 3.14

Surface area of the cylinder = $2 \pi r h+2 \pi r^{2}$

Substitute the given values in the surface area formula, we get

Surface area of the cylinder $=2\times3.14\times 5\times 21+2 \times3.14\times 5^2$

                                               $=659.4+157$

                                               $=816.4$ ft²

Hence the surface area of the cylinder is 816.4 sq. ft.

Answer 2

Answer:

it is C.) 816.8 sq ft

Step-by-step explanation:

Because i took the test and 1/1 point means i got it right