Posted by **Leo** on Thursday, June 14, 2012 at 5:12pm.

You plan to construct a brick wall measuring 4.5 m in length, 1.2 m high, and 0.5 m in width. If a brick measures 20 cm x 9 cm x 5 cm, how many bricks will you need?

Total volume (to the nearest tenth) = ________ cubic meters. The number of bricks =_________ .

- Math -
**Ms. Sue**, Thursday, June 14, 2012 at 6:10pm
First find the volume of the wall.

V = LWH

Find the volume of each brick.

Then convert that to cubic centimeters.

1 cubic meter = 1 000 000 cubic centimeters

- Math -
**Leo**, Thursday, June 14, 2012 at 6:21pm
volume of wall is 2.7

vol of each brick= 900

900,000,000

Is that how many bricks? Sounds like alot. Am I missing a step

- Math -
**Ms. Sue**, Thursday, June 14, 2012 at 6:28pm
Right -- the volume of the wall is 2.7 cubic meters = 2,700,000 cubic centimeters

Each brick's volume is 900 cubic centimeters.

Here's your mistake. You need to divide, not multiply.

2,700,000 / 900 = 3,000 bricks

- Math -
**Leo**, Thursday, June 14, 2012 at 6:30pm
got it. thanks again

- Math -
**Ms. Sue**, Thursday, June 14, 2012 at 6:31pm
:-) You're welcome.

- Math -
**guy**, Wednesday, March 27, 2013 at 5:22pm
a baseball measures 2 11/16 inches in diameter. What is its volume ( to the nearest hundredth )

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