Explanation

In 12 L mixture with ratio 1:3:  

Total parts = 1 + 3 = 4  

Water = (1/4) × 12 = 3 L  

Milk = (3/4) × 12 = 9 L  

Let x liters of water be added. Milk stays 9 L.  

New ratio: (3 + x) : 9 = 2 : 3  

So (3 + x)/9 = 2/3  

3(3 + x) = 18  

9 + 3x = 18  

3x = 9  

x = 3  

Last verified on 13-05-2026

Explanation

Let A = 3x, B = 5x

Increase B by 20% → new B = 5x × 1.2 = 6x

New ratio = A : B = 3x : 6x = 3 : 6 = 1 : 2

Last verified on 12-05-2026

Explanation

7 parts = 14 km → 1 part = 2 km

9 parts = 9 × 2 = 18 km

So second distance = 18 km

Last verified on 12-05-2026

Explanation

Green ratio = 5 parts = 60

1 part = 60 ÷ 5 = 12

Total ratio = 3 + 4 + 5 = 12 parts

Total value = 12 × 12 = 144

Last verified on 12-06-2026

Explanation

Ratio of boys : girls = 9 : 11

Total parts:

$$9+11=20$$

Total students = 80

Girls

$$frac{11}{20} times 80 = 44$$

$$Last\; updated\; question\; NS\; on\; 10\; MAY\; 2026$$