Surface Area of a Cube
Surface Area of a Cube
Surface Area of Cube: All the six faces of a cube are squares of the same size. i.e. for a cube we have l=b=h. Thus, if l cm is the length of the edge or a cube, then to calculate the total Surface Area of Cube we have to add the sum of area of all the faces of a cube.
Example:- Find the surface area of cube whose edge is 11cm.
Solution:- We know that the surface area of a cube=
Here, edge=11cm
Surface area of the given cube=
Example: Find the edge of a cube whose surface area is 1350 sq cm
Solution: Let the edge = x cm
Surface area of Cube is = 1350 sq cm
x= 15 cm
Example: A cubical box is to be painted on all the side.Find the cost of painting when the rate of painting 1sq cm. is Rs.5. The side of the cube is 16 cm
Solution: Side of a cube = 16 cm
Surface area of the cube =
A cubical box is to be painted on all the side. Find the cost of painting when the rate of painting of 1sq cm. is Rs.7. The side of the cube is 21 cm. | |||
| Right Option : C | |||
| View Explanation | |||
Find the surface area of the cube having edge as 12.5 cm.
| |||
| Right Option : A | |||
| View Explanation | |||
Find the surface area of a cube whose side is 11m. | |||
| Right Option : C | |||
| View Explanation | |||
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8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
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