An alloy of gold and silver weighs 50 gm. It contains 80% gold. How much gold should be added to the alloy so that percentage of gold is increased to 90?

An alloy of gold and silver weighs 50 gm. It contains 80% gold. How mu

1.	An alloy of gold and silver weighs 50 gm. It contains 80% gold. How much gold should be added to the alloy so that percentage of gold is increased to 90?
A.	45 gm
B.	40 gm
C.	50 gm
D.	None of these
Answer» D. None of these

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An alloy of gold and silver weighs 50 gm. It contains 80% gold. How much gold should be added to the alloy so that percentage of gold is increased to 90?

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