Calculate the circumference of a circle of radius 3 1/2 * m (Take pi = 3 1/7 )
A rectangular room 4m long 3m wide contains 30m ^ 3 of air. Calculate height of the room.
. It takes 96cm of wire to make a skeleton model of a cube. The length of one edge of the cube is?
1.
Circumference = 2 * pi * radius
Circumference = 2 * 3 1/7 * 3 1/2
Circumference = 2 * 22/7 * 7/2
Circumference = 22
Therefore, the circumference of the circle is 22 meters.
2.
Volume of the room = Length * Width * Height
30m^3 = 4m * 3m * Height
30m^3 = 12m^2 * Height
Height = 30m^3 / 12m^2
Height = 2.5 meters
Therefore, the height of the room is 2.5 meters.
3.
Perimeter of a cube = 12 * edge
96cm = 12 * edge
edge = 96cm / 12
edge = 8cm
Therefore, the length of one edge of the cube is 8cm.