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- Question
- One-fourth of the boys and three-eight of the girls in a school participated in the annual sports. What proportional part of the total student population of the school participated in the annual sports?
Options- A. 4/12
- B. 5/8
- C. 8/12
- D. Data inadequate
- Correct Answer
- Data inadequate
ExplanationData inadequate
- 1. The proportion of Zinc and Copper in a brass piece is 13 : 7. How much zinc will be there in 100 kg of such a piece?
Options- A. 20 kg
- B. 35 kg
- C. 55 kg
- D. 65 kg Discuss
- 2. If A : B = 2 : 3 and B : C =4 : 5, then C : A is equal to?
Options- A. 15 : 8
- B. 12 : 10
- C. 8 : 5
- D. 8 : 15 Discuss
- 3. If 10% of A is the same as 20% of B then A : B is equal to?
Options- A. 1 : 2
- B. 2 : 1
- C. 5 : 1
- D. 10 : 1 Discuss
- 4. 0.6 of a number equals 0.09 of another number. The ratio of the number is?
Options- A. 2 : 3
- B. 1 : 15
- C. 20 : 3
- D. 3 : 20 Discuss
- 5. If A : B = 7 : 9 and B : C = 3 : 5 then A : B : C is?
Options- A. 7 : 9 : 5
- B. 21 : 35 : 45
- C. 7 : 9 : 15
- D. 7 : 3 : 15 Discuss
- 6. Rs. 1050 is divided among P, Q and R. The share of P is 2/5 of the combined share of Q and R. Thus P gets?
Options- A. Rs. 200
- B. Rs. 300
- C. Rs. 320
- D. Rs. 420 Discuss
- 7. Rs. 385 has been divided among A, B, C in such a way that A receives 2/9th of what B and C together receive. Then A's share is?
Options- A. Rs. 70
- B. Rs. 77
- C. Rs. 82.50
- D. Rs. 85 Discuss
- 8. The speed of three cars are in the ratio 3 : 4 : 5. The ratio between times taken by them to travel the same distance is?
Options- A. 3 : 4 : 5
- B. 5 : 4 : 3
- C. 12 : 15 : 20
- D. 20 : 15 : 12 Discuss
- 9. The cost of making an article is divided between materials, labour and overheads in the ratio 3 : 4 : 1. If the materials cost Rs. 67.50, the cost of article is?
Options- A. Rs. 180
- B. Rs. 122.50
- C. Rs. 380
- D. Rs. 540 Discuss
- 10. A right cylinder and a right circular cone have the same radius and the same volume. The ratio of the height of the cylinder to that of the cone is?
Options- A. 3 : 5
- B. 2 : 5
- C. 3 : 1
- D. 1 : 3 Discuss
Ratio and Proportion problems
Search Results
Correct Answer: 65 kg
Explanation:
? 20 kg of brass contains zinc = 13 kg
? 100 kg of brass contains zinc = (13/20) x 100 kg. = 65 kg.
Correct Answer: 15 : 8
Explanation:
A/B = 2/3 and B/C = 4/5
? A/C = (A/B) x (B/C) = (2/3) x (4/5) = (8/15)
So, C : A = 15 : 8
Correct Answer: 2 : 1
Explanation:
10% of A = 20% of B
? 10/100 x A = 20/100 x B
? A/10 = B/5
? A/B = 10/5 = 2
Hence, A : B = 2 : 1
Correct Answer: 3 : 20
Explanation:
0.6 x a = 0.09 x b
? a/b = 0.09 / 0.06 = 9 / 60 = 3 / 20 = 3 : 20
Correct Answer: 7 : 9 : 15
Explanation:
A : B = 7
and B : C = 3 : 5 = 9 : 15
? A : B : C = 7 : 9 : 15
Correct Answer: Rs. 300
Explanation:
? P : (Q + R) = 2 : 5
? p's share = Rs. 1050 x (2/7) = Rs. 300
Correct Answer: Rs. 70
Explanation:
A : (B + C) = 2 : 9
? A's share = Rs. (385 x 2/11) = Rs. 70
Correct Answer: 20 : 15 : 12
Explanation:
Ratio of time taken = 1/3 : 1/4 : 1/5 = 20 : 15 : 12
Correct Answer: Rs. 180
Explanation:
If material cost Rs. 3, the cost of the article is = Rs. ( 3 + 4 + 1) = Rs. 8
If material cost Rs. 67.50, the cost of the article = Rs. (8/3 x 67.5) = Rs. 180
Correct Answer: 1 : 3
Explanation:
Let the heights of the cylinder and cone be h and H respectively.
? ?r2h = ?r2H / 3
? h/H = 1/3
? h : H = 1 : 3.
So their heights are in the ratio 1 : 3.
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