Question

The cost of decorating whole surface area of cube at the rate of rs 50 per cmsquare is rs 1440 .Then the volume of the cube is______​

Answer 1

Volume of the cube is 1.888 cubic cm.

1. The total cost of decorating the total surface area of the cube is Rs. 1440.
2. Cost per sq. cm is Rs. 50.
3. Therefore , total surface area of the cube will be (Total cost / Rate per sq. cm) = 1440 / 50 = 28.8 sq cm.
4. Now the Total surface area of the cube is 28.8 sq cm. = 6πr²
5. After calculation r=1.236
6. Volume of cube is r³ = (1.236)³ = 1.888 cubic cm.