Question

42. The ratio of milk and water in 55 liters of mixture is 7: 4. How much water must be
added to make the mixture’s ratio 7: 6 (in liters)?

Answer 1

Answer: 10 Litre

Step-by-step explanation:

Total mixture = amount of milk + amount of water

= 55 = 7x + 4x

= 55 = 11 x

= 55 / 11 = x

= 5 = x

Hence, mixture contains 7( 5 ) = 35 litres of milk and 4( 5 ) = 20 litres of water

Ratio = 35 : 20

Then, Let y must be added to each to the mixture to make the ratio 3 : 2

( 35 + y ) : ( 20 + y ) = 3 : 2

2( 35 + y ) = 3( 20 + y )

70 + 2y = 60 + 3y

70 - 60 = 3y - 2y

10 = y