A metal is made of copper and tin in the ratio of 3:2 by mass.
A sword made of the metal which weighs 1240 g.
Work out the mass of the tin in the sword.
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the total weight=1240 g.
given=3:2=3+2=5
1240/5=248 g
248x3=744 g copper
tin=248x2=496 g
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