Answer for question 10
by Pramod
(567/(162+x) = 1 1128=162+x ) 729 ml of a mixture contains milk and water in ratio 7:2. How much of the water is to be added to get a new mixture containing half milk and half water? total mixture is 729. it has 7x part milk and 2x part water i.e 7x+2x=729 x=81 Milk is 7*81=567 . Water is 81*2=168 suppose after adding y quantity of water their ratio become equal. i.e both become equal in quantity. 567/(168+y) = 1/1 567 = 168+y 567 - 168 = y y=399 this answer is not present in option But this is correct one. Anybody can cross-check it
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