Question

A wall 10 m long 1m high and 1/2 m wide is to be made of bricks . The bricks are of size 10 multiply 10 multiply 20 . how many bricks will be needed to make the wall.

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Answer 1

To find out how many bricks are needed to make the wall, we need to find the total area of the wall and divide it by the area of one brick.

The area of the wall is:

length x height x width = 10 m x 1 m x 0.5 m = 5 m^2

The area of one brick is:

10 cm x 10 cm x 20 cm = 2000 cm^3

To convert the area of the wall from square meter to cubic centimeter, we need to multiply it by 100*100 = 10000.

5 m^2 x 10000 = 50000 cm^2

Now we can divide the total area of the wall by the area of one brick to find out how many bricks are needed:

50000 cm^2 / 2000 cm^2/ brick = 25 bricks

So, 25 bricks will be needed to make the wall.