percentage of tin =45
percentage of zinc = 100-45=55
55x( total weight) =90
100
total weight= 90x100/55
= 1800/11
Wt of tin = (45x1800)/(100x11) = 73.6
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percentage of tin =45
percentage of zinc = 100-45=55
55x( total weight) =90
100
total weight= 90x100/55
= 1800/11
Wt of tin = (45x1800)/(100x11) = 73.6