Question

90 litres of a mixture of milk and water
contains 20% water. How much water should be
added so that the mixture has 28% water?
(a) 8litres
(b) 12litres
(c) 10litres
(d) 18litres
(e) 11 litres​

Answer 1

Answer:

Ans(c)

Step-by-step explanation:

1),water=90x20/100 = 18L

milk=90x 80/1oo=72L

2) After adding water the mixture=

xL

water=28%

milk=72%

Xx72/100=72L (No change)

x = 72x100/72 = 100L

Added Water = 100-90=10L