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If the cost of x meters of wire is 'd' rupees, that find the cost (in Rupees) of 'y' meters of wire at the same rate.

dy x
x - d
ydx
y + d

Correct Answer: ydx

Explanation:

Cost of x meters ropes = Rs. d
∴ Cost of 1 meters ropes = Rs. d /x
∴ Cost of y meters ropes = Rs. dy/x

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