# I need help with this math problem..

• Jan 22nd 2008, 01:07 PM
eh501
I need help with this math problem..
A planned building was going to be 100 feet long, 75 feet deep, and 30 feet high. The owner decides to increase the volume of the building by 10% without changing the dimensions of the depth and the height. What will be the new length of this building?

What do i do here?
• Jan 22nd 2008, 01:09 PM
colby2152
Quote:

Originally Posted by eh501
A planned building was going to be 100 feet long, 75 feet deep, and 30 feet high. The owner decides to increase the volume of the building by 10% without changing the dimensions of the depth and the height. What will be the new length of this building?

What do i do here?

$V=LWH$

$V=100*75*30 \Rightarrow 225000$

110% of volume is: $1.1V = 247500$

We want to change only the length of the building so: $247500=75*30*L$

I think you can solve the last part.(Handshake)
• Jan 22nd 2008, 01:19 PM
eh501
Wait why 110%?
• Jan 22nd 2008, 01:31 PM
colby2152
Quote:

Originally Posted by eh501
Wait why 110%?

Increasing by 10% means multiplying something by 110% or 1.1.
• Jan 22nd 2008, 01:39 PM
eh501
How many math problems can i post in one thread?
• Jan 22nd 2008, 01:40 PM
colby2152
Quote:

Originally Posted by eh501
How many math problems can i post in one thread?