Class VII

Two numbers are respectively 20% and 50% more than a third number. The ratio of the two numbers is:
  1. 2 : 5
  2. 3 : 5
  3. . 4 : 5
  4. 6 : 7
In a mixture 60 litres, the ratio of milk and water 2 : 1. If this ratio is to be 1 : 2, then the quanity of water to be further added is:
  1. 20 litres
  2. 30 litres
  3. 40 litres
  4. 60 litres
Seats for Mathematics, Physics and Biology in a school are in the ratio 5 : 7 : 8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio of increased seats?
  1. 2 : 3 : 4
  2. 6 : 7 : 8
  3. 6 : 8 : 9
  4. None of these
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