Page 16 - Digi Notes : Maths - 11.03.2016

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? Liter 30 Liter

Water Milk

0 16

. 7 50

. 8 50 : . 7 50

Water : Milk 17 : 15

 Water  30  17  34 liter
15

21. How much water be mixed with 30 liters of pure

milk costing Rs.16 per liter so that on selling the mixture

at Rs.9 per liter; a profit of 20% would be made?

Cost Mixture  9  100 %  Rs 7/ . 50 per liter
120 %

? Liter 30 Liter
Water Milk

0 16

. 7 50

. 8 50 : . 7 50
Water : Milk 17 : 15

 Water  30  17  34 liter
15

22. In what ratio must an acid having 20% H2SO4 be

mixed with another acid having 50% H2SO4; in order to

get an acid having 30% H2SO4.

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