Question

Edge of a cube is 3cm. Find: i) total surface area of the cube ii) internal volume of a rectangular box, if it's filled with 30 such cubes.

Answer 1

Answer:

1)total surface area of cube=6×a^2

here, a=3cm

therefore,total surface area = 6×(3)^2=54cm^2

2)volume of rect.box= 30× volume of one cube

since, volume of cube= a^3

here,a=3

therefore, volume of cube=3^3=27cm^3

now, volume of rect=30×27=810cm^3