# Aptitude - Chain Rule - Discussion

Discussion Forum : 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?
 Rs. xy d
Rs. (xd)
Rs. (yd)
 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

Discussion:
15 comments Page 1 of 2.

Damilare james said:   1 year ago
I think the right answer is Rs.(yd).

Damilare james said:   1 year ago

Mayank Kumar said:   3 years ago
Thanks everyone for explaining.

Chandrakala said:   4 years ago
According to me, the answer is xy/d.

Sundaresh said:   7 years ago
x = 5 meters d = 10rupees
y = 7 then d = ?

10/5 = 2; 2 * 7 = 14.
How to get this mean d/x *y?

Nikhil yamalwar said:   8 years ago
X/d = y/?

suppose ? = p, then cross multiplication.

You will get ans: x*p = yd.

P = (yd/x).

Manikandan said:   8 years ago
We know cost of x is d then y is using matrix multiplication format.

Kharinagendra said:   8 years ago
X meters.....d rupees.

Y meters......?

Then cross multiplication yd/x.

Rajini said:   8 years ago
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.

Parameswaran.G said:   10 years ago
We known X and D,

Then we need Y meters of wire.
Let as,