HEMANTHKUMARVARADHARAJAN

• Jun 20th, 2006

 

It has 20 mixutre conatins mil and water in the ratio 3:5,replace 4 litres of mixturewith 4 litres of water what is the final ratio of milk and water.Ans:Let the mixture contains 3x litres of milk and 5x litres of water.3x + 5x = 20=> 8x = 20=> x = 2.520 litres of mixture contains 7.5 litres of milk and 12.5 litres of water Then 7.5 : 16.5 = 5:11Therefore the final ratio of milk and water in the new mixture is 5:11

divya

• Jul 8th, 2006

 

i tink da ans is 3:7milk is 7.5water is 12.5den 4ltrs is replaced in dat milk is 1.5 and water is 2.5 and 4litres water is added so 7.5-1.5=612.5-2.5+4=14 so ansis 3:7

suyambu

 Profile Answers by suyambu 

• Jan 27th, 2009

 

Initially It contains 20 mixtures.
Milk : water 3 : 5
so, 3x+5x=20
8x =20
x=2.5

Milk : water = 7.5 : 12.5 (7.5+12.5=20)
Now 4 mixture replace with water.
so, 16mixture+4litre of water
16 mixture, 3x+5x=16
8x =16
x=2

so, for 16mixture, the ratio of milk and water is,
6(milk):10(water)
now add 4litre of water.

so now we have 6litre of milk and 14litre water.
the ratio is, 6:14 3:7