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4Au + 8CN- + 2H,0 +0, 4[Au(CN),
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Zinc in the extraction of gold acts as alan
a) oxidising agent b) flux
c) reducing agent d) decomposing agent.
Answers
Given
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Cost of Fencing = Rs. 3648
Rate of Fencing = Rs. 28.50 @metre
Length : Breadth = 5 : 3
Find Dimensions of Park.
Let the Length be 5n, and Breadth be 3n.
⋆ Refrence of Image is in the Diagram :
• Let's Head to the Question Now :
\begin{lgathered}\longrightarrow \tt Cost = Perimeter \times Rate \\ \\\longrightarrow \tt 3648 = Perimeter \times 28.50 \\ \\\longrightarrow \tt \dfrac{3648 \times 10}{285} = Perimeter \\ \\\longrightarrow \tt \dfrac{36480}{285} = Perimeter \\\end{lgathered}
⟶Cost=Perimeter×Rate
⟶3648=Perimeter×28.50
⟶
285
3648×10
=Perimeter
⟶
285
36480
=Perimeter
\begin{lgathered}\longrightarrow \tt Perimeter = 128\:m \\ \\\longrightarrow \tt2(Length + Breadth) = 128\:m \\ \\\longrightarrow \tt2(5n + 3n) = 128 \\ \\\longrightarrow \tt2 \times 8n = 128 \\ \\\longrightarrow \tt16n = 128 \\ \\\longrightarrow \tt n = \cancel\dfrac{128}{16} \\ \\\longrightarrow \blue{\tt n = 8}\end{lgathered}
⟶Perimeter=128m
⟶2(Length+Breadth)=128m
⟶2(5n+3n)=128
⟶2×8n=128
⟶16n=128
⟶n=
16
128
⟶n=8
• D I M E N S I O N S :
◗ Length = 5n = 5(8) = 40 m
◗ Breadth = 3n = 3(8) = 24 m