Aptitude - Chain Rule - Discussion

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"Do not wait for leaders; do it alone, person to person."

- Mother Teresa

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?

[A].

Rs.		xy
		d

[B].

Rs. (xd)

[C].

Rs. (yd)

[D].

Rs.		yd
		x

Answer: Option A

Explanation:

Cost of x metres = Rs. d.

Cost of 1 metre = Rs. d

x

Cost of y metres = Rs. d . y = Rs. yd .

x x

Miyyapuram said: (Tue, Jan 18, 2011 12:54:52 PM)

for x metres the cost is drupees den x------>d y------>? den y*d/x=ans(cross multiply)

Divya said: (Sat, Jul 16, 2011 05:07:54 AM)

If the cost of x meters is d. then cost of one meter will be d/x. then if we have to find the cost of y meters we have to multiply the y with cost for one meter. thus it is y*d/x.

Deepa said: (Mon, Sep 10, 2012 01:53:53 PM)

Cost of x meters is d. Cost of 1 meters is d/x. Then cost of why meters is d*y/x.