Question

Kalicharan gets some coins made of an alloy of gold and silver. The alloy with a weight of 100 gm contains 20% of gold. What weight of another gold-silver alloy containing 60% of silver must be alloyed with the first piece of alloy in order to obtain a new alloy with 32% of gold?

Answer 1

(40% W+ 20%×10) /W+100= 32%

solve it...

W= 150 gm