Priyanka Mehta

CAT Preparation Community 10y ago

There are two alloys of gold and silver. In the first alloy there is twice as much as gold as silver,and in second alloy there is 5 times less gold than silver.

How many times more must we take of the second alloy than the first in order to obtain a new alloy in which there would be twice as much silver as gold

7

Suri GangulaFaculty 9y ago

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Ranbir Kapoor 10y ago

A1: S = x , G=2x
A2: S=6y, G=y
Taking 'a' quantities of A1 and 'b' quantities of A2.
A3: ax+6yb=2(2ax+yb)
a/b= 3x/4y
Since we do not know amount of Gold and Silver in A1 and A2. I don't think we'll be able to answer any better.

Raviraj 9y ago

Explain please

nasreen fathima 8y ago

Please give solution for this question 

SUVAM DEBNATH 5y ago

2 times

Kartikey Keshari 4y ago

G S A1 - 1 : 2 = 2kg + 4kg {let both alloy 6 kg } A2 -. 5 : 1 = 5kg + 1 kg We need new alloy - 1:2 If we add one A1 and one A2 gold and silver would be 5kg and 7 kg but 5:7 ≠ 1:2 if we add one A1 and two A2 Gold = 4 + 1+1 = 6 kg Silver = 2+5+5 = 12 kg 6kg : 12 kg ~ 1 : 2. So we must to take two tims more of the second alloy than the first. Two times ,, Ans.

Atul gupta 2y ago

3 times more??

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