Question

to construct a wall 25 m long 0.3 m thick and 6 m high brick of dimensions 25cm×15cm×10cm each is used . if the motor occupies 1/10 of the volume of the wall find out the number of bricks used.
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Answer 1

Answer:

ANSWER

Wall is 24m long, 0.4m thick and 6m high.

So, volume of wall = 24m×0.4m×6m=57.6m

3

.

Since

10

1

th of the volume of the wall is occupied by mortar, so the volume of bricks in the wall,

=(1−

10

1

) part of the wall,

=

10

9

th part of the wall

=

10

9

×57.6m

3

=51.84m

3

Volume of one brick = 25cm×16cm×10cm

100

25

×

100

16

×

100

10

m

3

=0.004m

3

∴ Required number of bricks = (Volume of bricks in the wall)/(Volume of one brick)

=

0.004

51.84

=12960

So, 12960 bricks are used in constructing the wall.

Hope its helpful to u