Question

if each edge of a cube is doubled

Answer 1

If the edge of the cube is doubled volume of the cube is increases by 8 times. If the edge of the cube is doubled surface area of the cube increases by 4 times.

Answer 2

1 let the edge of the cube =a units volume = v = a3--- (1) surface area =6a^2 square units--- (2)
2 if length of each edge doubled the new cube edge =2a units volume = v =(2a) ^3=8a^3=8×(1)
=8 times of the first cube volume
=3)surface area =a=6*(2a) ^2
=6×4a^2
=4×(6a^2)
=4 times of the first cube