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Ganezh [65]
3 years ago
5

Find the lateral surface area of the figure.

Mathematics
2 answers:
Brut [27]3 years ago
7 0

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.

Alex Ar [27]3 years ago
5 0

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

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