Answer:
√30-2√5m
Step-by-step explanation:
You can start by figuring out the side length of a cube with the respective surface areas.
Given the equation S=√SA/6, you can start with the 180m^2 cube, and plug the values in.
S=√180/6
S=√30
Next, you can do the same thing with the 120m^2 cube.
S=√120/6
S=√20
S=√4*5
S=2√5
In order to find how much longer the first cube is, you should subtract the side length of the second cube from the first.
You should get: √30-2√5m
Hence, the correct answer is B.
