Page 11 - Digi Notes : Maths - 11.03.2016

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1  1  2
:  1  
3  3  3
1 : 2

Part 1 Part 2

 10% x%

20%

 x 20 % : 30%
We have

x  20 1
  2 x 40  30  x  35 %
30 2
11. In what proportion must water be mixed with milk

to gain 20% by selling it at cost price?

Let CP Spirit  Rs / 1 . Liter

SP Spirit Water  Rs / 1 . Liter  Rs / 0 . Liter  Rs / 1 . Liter

CP Spirit Water  Rs / 1 . Liter  100 %  Rs . 5 / Liter
120 % 6
CP Water CP Spirit

0 1

5
6
1 : 5
6 6

5
W ater:Spiri t  1 :  1: 5
6 6

12. How many kg of salt at 42 paisa per kg must a man

mix with 25 kg of salt at 24 paisa per kg so that he may

on selling the mixture at 40 paisa per kg, gain 25% on the

outlay?

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