Posted by **dingbat** on Friday, March 29, 2013 at 11:14pm.

Q:Sabrina is making two bird feeders in the shape of right rectangular prisms. The smaller feeder has dimensions that are 1/4 of the dimensions of the larger feeder. Using the formula V=lwh, how do their volumes compare???

A:

A) The volume of the larger feeder is 4 times as great as the volume of the smaller feeder.

B) The volume of the larger feeder is 12 times as great as the volume of the smaller feeder.

C) The volume of the larger feeder is 64 times as great as the volume of the smaller feeder.

D) The volume of the larger feeder is 82 times as great as the volume of the smaller feeder.

- 7th grade math -
**dingbat**, Friday, March 29, 2013 at 11:18pm
Can someone help check this for me???

I believe the answer is B but I am really unsure....

- 7th grade math -
**dingbat**, Friday, March 29, 2013 at 11:39pm
HELP!!!!!

- 7th grade math -
**Steve**, Saturday, March 30, 2013 at 4:54am
if the sides scale by 4, the volume scales by 4^3=64, so (C)

You can see why this is, since the original volume is

v = lwh

Now, with each dimension scaled by 4,

V = (4l)(4w)(4h) = 4*4*4(lwh) = 4^3 v

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