Volume and surface area And cubes

Question

Cube A has a surface area of 150 cm²

Cube B has sides half the length of Cube A 

 

What at is the volume of Cube B?

Answer 1

Lt x = length of a side of cube A    Then, 6x² = 150.

 

                                                         So, x² = 25     x = 5 cm

 

So, length of a side of cube B is x/2 = 2.5 cm

 

Therefore, volume of cube B is (2.5 cm)³ = 15.625 cm³