In a 40-litre mixture of milk and water, the ratio is 3:2. How many litres of water must be added to change the ratio to 1:2? MCQ with Answer and Explanation

Explanation:
Original 100, new 130. Decrease % = (30/130)×100 ≈ 23.08%.

Explanation:
2% of 1000 = 20, 2% of 20 = 0.4.

Explanation:
Original x, xy=144. 0.9x(y+4)=144 → 129.6 + 3.6x =144 → 3.6x=14.4 → x=4, reduced 3.6. Option C 3.6? But 3.24 is there. Check: x=4, reduced 3.6. So answer C. I'll set option C Rs. 3.6.