# Aptitude - Chain Rule - Discussion

### Discussion :: Chain Rule - General Questions (Q.No.2)

2.

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

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: (Jan 18, 2011) for x metres the cost is drupees den x------>d y------>? den y*d/x=ans(cross multiply)

 Divya said: (Jul 16, 2011) 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: (Sep 10, 2012) Cost of x meters is d. Cost of 1 meters is d/x. Then cost of why meters is d*y/x.

 T.Rajesh said: (Sep 22, 2012) for X:d::Y:p then p is Xp =Yd p =Yd/X

 Anil said: (Nov 6, 2013) x meters--->d rupees. For 1 meter, we get d/x. For y meters simply multiply d/x with y.

 Parameswaran.G said: (Dec 21, 2013) We known X and D, Then we need Y meters of wire. Let as, WE GET ANSWER =(D/X)* Y.

 Rajini said: (Apr 4, 2015) We know the cost of x rupees is d meters cost of one meter is d/x cost of y meters is d/x*y.

 Kharinagendra said: (Apr 28, 2015) X meters.....d rupees. Y meters......? Then cross multiplication yd/x.

 Manikandan said: (Jul 31, 2015) We know cost of x is d then y is using matrix multiplication format.

 Nikhil Yamalwar said: (Feb 20, 2016) X/d = y/? suppose ? = p, then cross multiplication. You will get ans: x*p = yd. P = (yd/x).

 Sundaresh said: (Aug 29, 2016) x = 5 meters d = 10rupees y = 7 then d = ? 10/5 = 2; 2 * 7 = 14. How to get this mean d/x *y?

 Chandrakala said: (May 26, 2019) According to me, the answer is xy/d.

 Mayank Kumar said: (Jul 3, 2020) Thanks everyone for explaining.