Question

What’s the volume of this cylinder? rounded to the nearest ma tenths

Answer 1

Answer: 800π km³

Explanation: To find the volume of a cylinder, start with the formula for the volume of a cylinder.

`Volume = \pi r^(2) h`

In this example, notice that our cylinder has a radius diameter of 20 km. Since we are given the diameter of the cylinder, we will need to divide 20 by 2 in order to find the radius. 20 ÷ 2 = 10, this means that our radius of the cylinder is 10 km and the height of the cylinder is 8 km. Now, we can plug these numbers into our formula.

`Volume = (\pi) (10 km)^(2) (8km)`

Now, let's simplify the exponent. Remember that squaring a number just means multiplying the number by itself. In this case, 10 km² is equal to 10 km multiplied by 10 km or 100 km².

`Volume = (\pi) (100 km^(2)) (8 km)`

`Volume = 800\pi km^(3)`