Book Maths Puzzle

50kg of an alloy of lead and tin contains 60% of lead. How much lead must be melted into it to make the alloy contain 75% of lead?

Read Solution (Total 1)

ans:30
Lead amount=60/100 * 50=30
30+x/50+x =.75
x=30
11 years agoHelpfull: Yes(0) No(0)

Book Other Question

Log( X+3 ) + log ( X + 5 ) = log 35 The ages of Neha and Kavita are in the ratio of 7:5. Ten years hence, the ratio of their ages will be 9:7. Find their present ages.