ok so they’re asking for the difference between the lengths of the sides of each cube. they have different SA’s (surface areas). all you gotta do is plug in the SA in the given equation to find the length of the side and THEN you subtract the answers and thats how you find the difference between the sides.
given: s = √(SA/6) SA1 = 240 m^2 SA2 = 180 m^2
S1 = √(240/6) = 2√10 or 6.32 S2 = √(180/6) = √30 or 5.47
