Question

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Answer 1

Answer:

Volume of a brick = 0.00975 m³.

Step-by-step explanation:

Volume of the wall = 63 m³

Cost to build the wall = 84000 Rs

Cost to prepare a brick = 13 Rs

Since, relation between cost of the wall is directly proportional to the volume of the wall

C ∝ V

C = kV

Here, k = Proportionality constant

k = $\frac{C}{V}$ = Constant

Therefore,

$\frac{C_1}{V_1}=\frac{C_2}{V_2}$

$\frac{84000}{63}=\frac{13}{V_2}$

V₂ = $\frac{13\times 63}{84000}$

    = 0.00975 m³

Therefore, volume of a brick is 0.00975 m³.