top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration

Facebook Login
Site Registration

A lump of two metals weighing 18 gms is worth Rs.87 but if their weight be interchanged, it would be worth Rs.78.60...

+1 vote
392 views

A lump of two metals weighing 18 gms is worth Rs.87 but if their weight be interchanged, it would be worth Rs.78.60. If the price of one metal be Rs.6.70 per gm., find the weight of the other metal in the mixture.

posted Jun 22, 2016 by anonymous

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

Let Wa the weight of metal A and Wb the weight of metal B and X the price of metal B
We can write the following system of three equations:
Wa + Wb = 18
Wa x 6,70 + Wb x X = 87
Wb x 6,70 + Wa x X = 78,60
Solving this system yields
Wa = 10 and Wb = 8

answer Jun 28, 2016 by anonymous



Similar Puzzles
Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Bangalore-560102
Karnataka INDIA.
QUERY HOME
...