Homework Help: maths

Posted by leena on Monday, February 25, 2013 at 4:54pm.

find the number of bricks, each measuring 25 cm x 16 cm x 10 cm required to construct a wall 24 m long, 6 m high and 0.4 m thick. the mortar occupies (1/10)th of the volume of the wall

maths - Ms. Sue, Monday, February 25, 2013 at 4:59pm
V = 25 * 16 * 10

V = 4,000

0.9 * 4,000 = 3,600 cubic meters

0.25 * 0.16 * 0.1 = 0.004 cubic meters for each brick

3600 / 0.004 = 900,000 bricks

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