Explanation

a:b = 7:8

b:c = 4:5

Make b same:

a:b = 14:16

b:c = 16:20

Therefore, a:c = 14:20 = 7:10.

Last verified on 14-05-2026

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

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

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

Explanation

Profit is divided in the ratio of (capital × time).

Given:

• Capital ratio A : B = 4 : 5
• Time: A = 9 months, B = 9 months

So time is same, only capital matters:

Profit ratio = 4 : 5

Total profit = 22000

Total parts = 4 + 5 = 9

A’s share:

4/9​×22000=9777.78≈9778

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

Explanation

Ratio boys : girls = 9 : 11
Total students = 80

Total parts = 9 + 11 = 20

Each part = 80 ÷ 20 = 4

Girls = 11 parts:

$$11\times 4=44$$

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

Explanation

A’s 1 day work = 1/12

B’s 1 day work = 1/18

Combined work = 1/12 + 1/18

= (3 + 2) / 36 = 5/36

Time taken = 1 ÷ (5/36) = 36/5 = 7.2 days

Last verified on 10-05-2026

Explanation

Make B common in both ratios:

A:B = 2:3 → multiply by 4 → A:B = 8:12

B:C = 4:5 → multiply by 3 → B:C = 12:15

Now combine:

A:B:C = 8:12:15

Last verified on 10-05-2026