Question

So bad at this someone help

Answer 1

Volume of a cylinder : πr^2h

: π = 22/7

: r = 9

: h = 20

: 22/7 × 9^2 × 20

: 5091.4 (corrected to 1.dp )

Answer 2

5089.4 cm³

Explanation:

You want the volume of a cylinder with radius 9 cm and height 20 cm.

Volume

The volume of a cylinder is given by the formula ...

V = πr²h

Application

For r = 9 cm and h = 20 cm, the volume is ...

V = π(9 cm)²(20 cm) = 1620π cm³

The value you get for this depends on the value you use for π. The attachment shows the three common choices: "π button", 3.14, 22/7.

Using the "pi button" value provided by a calculator, the volume is ...

5089.4 cm³

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