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.