A) 4
B) 9
C) 12
D) 36
Correct Answer: D
Solution :
\[\frac{x}{{{y}^{2}}}=\frac{4}{{{(5)}^{2}}}=\frac{{{x}_{1}}}{{{(15)}^{2}}}(\because x\,\,\text{varies}\,\,\text{directly)}\] Or \[{{x}_{1}}=\frac{15\times 15\times 4}{5\times 5}\Rightarrow {{x}_{1}}=36\]You need to login to perform this action.
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