CAT Exam Category

the ratio of copper and zinc in brass is 13:7.how much zinc there will be in 100kg of brass?

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proportion of copper only =7/(7+13)
proportion of copper in 100kg brass =100*(7/20)=35
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ratio of copper:zinc=13:7
100kg of brass contain
Zinc= (7/20)*100=35 kg
Copper=(13/20)*100=65kg
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100/(13+7)=5
amt of zinc is 7*5=35
ans : 35kg
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7/(13+7)*100 = 35kg
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zinc 35 kg
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100/(13+7)=5
amt of zinc is 7*5=35
ans : 35kg
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CAT Other Question

Divide Rs.7500 among A.B.C such that A share is to B share in the ratio of 5:2.B's share is to C share in the ratio of 7:13.how much will bill B receive? a contractor agreed to complete a work in 40 days.he engaged 25 men for the work and after 24 days,only one third of the work was completed.how many more men must he employ to complete the work 4days earlier?