Question

a wall is 4cm hight and 40cm wide. if it contains two window of dimension 2.5m×1m and a gate way of dimension 2m×3m, 24560 cubical bricks of length 2ocm are required to construct the wall. find the length of the wall.nepal 17
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Answer 1

Answer:

15m

Step-by-step explanation:

Length of wall be l

width = 40 cm x 0.4 m

Volume of wall = 4 x 0.4 x l

= 1.62 $m^{3}$

Volume of windows = 2(2.5 m X  1m  X 0.4 m)

= 2.4 $m^{3}$

Volume of wall excluding window and gateway = 1.6 l  - (2+2.4)$m^{3}$

=(1.6 l - 4.4)$m^{3}$

Volume of each slabs = (0.2)$m^{3}$

= 0.008 $m^{3}$

Number of slabs = $\frac{Volume of walls }{Volume of each slabs}$

$\frac{2450}{1}$= $\frac{1.6l-4.4}{0.008}$

1.6l - 4.4 = 19.6

1.6 l = 19.6 +4.4

l = $\frac{24}{1.6\\}$

l = 15m