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2 years ago

Some identical cylinders each have a radius of

Mathematics

1 answer:

Anni [7]2 years ago

4 0

Answer:

8 cylinders

Step-by-step explanation:

The surface area of a cylinder is given by the formula ...

A = 2πr(r +l) . . . . . for radius r and length l

The cylinders Rufus has each have an area of ...

A = 2π(5 cm)(5 cm +4 cm) = 90π cm² ≈ 282.74 cm²

That means 2500 cm² of paint will cover ...

2500 cm²/(282.74 cm²/cylinder) ≈ 8.84 cylinders

Rufus has enough paint to cover 8 cylinders completely.

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3 years ago

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