3 years ago

Brainly if u awnser!

Mathematics

1 answer:

just olya [345]3 years ago

4 0

The formula of a perimeter of a rectangle l × w:

P = 2l + 2w

We have the perimeter P = 76 cm and the length l = 20 cm. Substitute:

76 = 2(20) + 2w

76 = 40 + 2w subtract 40 from both sides

36 = 2w divide both sides by 2

18 = w

Answer: width = 18 cm.

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Use the net below to determine the surface area of the cylinder. (Use 3.14 for Tr.)

baherus [9]

Option D:

Surface area of the cylinder = 753.6 cm²

Solution:

To find the surface area of the cylinder:

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Radius of the cylinder = 6 cm

Height of the cylinder = 14 cm

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

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