Find the volume of a cube one face of which has an area of 81m square
To find the volume of a cube, we need to know the length of one side of the cube.
In this case, we are given that one face of the cube has an area of 81 square meters. The area of a square can be found by squaring the length of one side.
So, let's find the length of one side:
√81 = 9
Therefore, the length of one side of the cube is 9 meters.
Now that we know the length of one side, we can calculate the volume of the cube. The volume of a cube is given by the formula:
Volume = length × width × height
Since a cube has all sides equal in length, in this case, the length, width, and height are all 9 meters.
Volume = 9 × 9 × 9 = 729 cubic meters
Therefore, the volume of the cube is 729 cubic meters.
My response is good
Area =l^2
.81=l^2
9^2=l^2
L=9m
Volume=l^3