An alloy of copper and bronze weight 50g. It contains 80% Copper. How much copper should be added to the alloy so that percentage of copper is increased to 90%?
A) 45 gm
B) 50 gm
C) 55 gm
D) 60 gm
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100%...................50g
90%....................?
=(90×50)/100= 45g....ur ans
90%....................?
=(90×50)/100= 45g....ur ans
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