What is volume?
(Easy question for those who need their own homework questions answered quickly)

Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains.

Step-by-step explanation:

volume is length times width times height

Step-by-step explanation:

Radius = 7.5cm

Diameter = 15cm

Step-by-step explanation:

Radius is a straight line that connects the center of a circle to a point on the circumference (outside of the circle).

A Diameter is a straight line that goes through the center of a circle and connects two points on the circumference (outside of the circle).

The line shown goes from the center to the outside of the circle, so it is the radius.

Radius = 7.5cm.

The diameter of a circle is twice the length of the radius.

d = 2r

d = 2 x 7.5

d= 15cm

Therefore the radius is 7.5cm and the diameter is 15cm!

Hope this helped!