Question
If the cost of x metres of wire is d rupees, then what is the cost of y metres of wire at the same rate?
Answer: Option D
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Cost of x metres = Rs. d.
Cost of 1 metre = Rs. \(\left(\frac{d}{x}\right)\)
Cost of y metres = Rs. \(\left(\frac{d}{x}.y\right)\) = Rs. \(\left(\frac{yd}{x}\right)\)
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