Question

what will be change in volume when its side become 10times the original side

Answer 1

Volume of the cube = (side)^3
Let the side be x
So volume will be x3
Now the side becomes 1.2x so the volume will be (1.2x)^3 = 1.728x^3.
Therefore increase in volume is (1.728x^3/x^3)
1.728x^3 - x^3 = 0.728x^3
Therefore percentage increase in volume is (.728x^3/x^3)*100 - 72.8%
Hence option no. (3)