Volume of prism base area 7.5 length 4

Step by step, with the reason for every step · Prisms · Geometry

Step by step

Question: find the volume of a prism with base area 7.5 square units and length 4.

A prism has the same shape all the way through.

The face at the end is the base.

Its area is A = 7.5 square units.

The prism is that base, stacked up 4 long.

Like the circle of a cylinder.

So the volume is V = A × length.

V = A × length

Now put the numbers in: A = 7.5 and length = 4.

V = 7.5 × 4

Forget the points: 75 times 4 is 300.

The numbers have 1 digit after the point.

So the answer has 1 too: 30.0, which is 30.

75 × 4 = 300 → 30.0

So the volume is 30 cubic units.

V = 30

Answer

V = 30

Try this one yourself, then check:

Find the volume.

Show the answer

V = 51