Ok, so this problem, asks you, if you

double the length on a side in your room,

how much bigger will your new floor rug be

This of course is using the fact that area

is proportional to length squared.

Alright, so if you double the length, you

have to quadruple the area, so the

answer is B, 4 times as many square meters

The second question is about volume, and

we saw before that volume is proportional

to length cubed, or scales with length

cubed. Ok, so now if I double the length,

from 3 m per side to 6 m per side, I get

2 ^ 3, or 8 times the volume.

8 * 2.5 is 20 cubic meters.