Ratio of present ages of A and B is 6:5. After 5 years, the ratio becomes 9:6. Present age of A is? MCQ with Answer and Explanation

Ratio of present ages of A and B is 6:5. After 5 years, the ratio becomes 9:6. Present age of A is?

A. 180 years

B. 95 years

C. 90 years

D. 85 years

Answer: Option C

Let ages 6k and 5k. Then (6k + 5)/(5k + 5) = 9/6. Solving gives k ≈ 15, age of A = 6*15 = 90.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in the ratio 7:8 and their sum is 322. Find the numbers.

A. 142 and 188

B. 163 and 154

C. 147 and 168

D. 294 and 336

Correct Answer: Option C

Explanation:
Numbers = 7k and 8k. 7k + 8k = 322 ⇒ k = 21. Thus, numbers are 147 and 168.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Find the mean proportional between 19 and 14.

A. 16

B. 32

C. 19

D. 33

Correct Answer: Option A

Explanation:
Mean proportional = √(19 × 14) = √(266) = 16.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Milk and water are in ratio 8:6 in a 373 L mixture. Quantity of milk?

A. 213 L

B. 160 L

C. 426 L

D. 253 L

Correct Answer: Option A

Explanation:
Total parts = 14. Milk = [8 / (8+6)] × 373 = 213 L.

This question belongs to: Maths Ratio and Proportion