in a mixture of 20 litres, the pure milk is 60%,what quantity of water should be added so that pure milk becomes 40%?​

4 litres

Step-by-step explanation:

First, we are going to find 60% of 20 litres.

20 × = 12 litres

∴ Pure milk 12 litres.

Now we find 40% of 20 litres.

20 × = 8 litres

To find the quantity of water to be added we subtract the 8 litres from the 12 litres.

12 - 8 = 4 litres

∴ 4 litres of water should be added so that pure milk becomes 40%

1) c 2143.6 cm

2) c 113.0 m

3) a 33.5 ft

4)   d 2 cm

5) c 20 mm

6) 180 in

7) d 120 ft

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.