Find the surface area of the cylinder in terms of x.

Mathematics

2 answers:

Alekssandra [29.7K]2 years ago

7 0

Surface area in units of PI = 2 x r x h +2 x r^2

first picture:

r = 7, h = 18

2 x 7 x 18 + 2 x 7^2

252 + 98

350 PI cm^2

2nd picture:

2 x 9 x 20 +2 x 9^2

360 + 162

522 PI in^2

svlad2 [7]2 years ago

4 0

Surface area = 2πr² + 2πrh

Surface are = 2π (7)² + 2π(7)(18) = 98π + 252π = 350π cm²

Surface area = 2πr² + 2πrh

Surface are = 2π (9)² + 2π(9)(20) = 162π + 360π = 522π cm²

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