Question

A cylinder has a base diameter of 16cm and a height of 19cm. What is its volume in cubic cm, to the nearest tenths place?

Answer 1

Answer:

V = 3216.9 $cm^{3}$

Step-by-step explanation:

Volume of a cylinder = π $r^{2}$ h

We are given diameter, 16cm, and half of it is the radius

r = 8cm

h = 19cm

Substitute the values into the equation

V = π * $8^{2}$ * 19

V = 3216.9 $cm^{3}$

Answer 2

Answer:

$3820.14cm^{3}$

Step-by-step explanation:

The formula for the area of the circle is:  $\pi r^{2}$

To work this out you would first need to find the area of the circle. To do this you would first divide the diameter of 16 by 2. This is to work out the radius, which gives you 8. Then you would multiply pi by 8 squared. This is to work out the area of the base of the cylinder (circle), which gives you 201.06. Then you would multiply 201.06 by the height of 19, which gives you 3820.14.

1) Divide 16 by 2.

$16/2=8$

2) Multiply pi by 8 squared.

$\pi *8^{2} =201.06$

3) Multiply 201.06 by 19.

$201.06*19=3820.14cm^{3}$