Discussion
Home ‣ Aptitude ‣ Ratio and Proportion Comments
- Question
- If 4a = 5b and 7b = 9c, then a : b : c is equal to
Options- A. 45 : 36 : 28
- B. 44 : 33 : 28
- C. 28 : 36 : 45
- D. 36 : 28 : 45
- Correct Answer
- 45 : 36 : 28
ExplanationGiven that 4a = 5b
? a/b = 5/4
Also 7b = 9c
? b/c = 9/7
? a : b = 5 : 4 = (5 x 9) : (4 x 9) = 45 : 36
and b : c = 9 : 7 = (9 x 4) : (7 x 4) = 36 : 28
? a : b : c = 45 : 36 : 28 - 1. If a : b = 3 : 5 and b : c = 4 : 7 then a : c is equal to
Options- A. 11 : 35
- B. 35 : 11
- C. 35 : 12
- D. 12 : 35 Discuss
- 2. If a : b = b : c, then ratio a 4 : b 4 is equal to
Options- A. ac : b2
- B. a2 : c2
- C. c2 : a2
- D. b2 : ac Discuss
- 3. What will be the inverse ratio of 17 : 19?
Options- A. 19 : 17
- B. 18 : 17
- C. 17 : 18
- D. 19 : 5 Discuss
- 4. Find the triplicate ratio of 7 : 5?
Options- A. 125 : 343
- B. 343 : 125
- C. 344 : 125
- D. 343 : 126 Discuss
- 5. Find the sub-duplicate ratio of 81 : 64?
Options- A. 8 : 9
- B. 4 : 9
- C. 9 : 8
- D. 7 : 8 Discuss
- 6. If a/7 = b/9 = c/11, then find a : b : c?
Options- A. 11 : 9 : 7
- B. 9 : 7 : 11
- C. 7 : 9 : 11
- D. 11 : 7 : 9 Discuss
- 7. If 30% of A = 20 % of B, then find the value of A : B?
Options- A. 1 : 3
- B. 3 : 2
- C. 3 : 1
- D. 2 : 3 Discuss
- 8. If P : Q : R = 2 : 3 : 4, then find P/Q : Q/R : R/P?
Options- A. 8 : 9 : 24
- B. 9 : 8 : 24
- C. 24 : 8 : 9
- D. 8 : 24 : 9 Discuss
- 9. If A = B/4 and B = C/2, then find the value of A : B : C?
Options- A. 8 : 4 : 1
- B. 4 : 2 : 1
- C. 1 : 4 : 8
- D. 1 : 2 : 4 Discuss
- 10. If 0.8 x A = 0.09 x B, then find A : B.
Options- A. 9 : 80
- B. 3 : 80
- C. 80 : 9
- D. 7 : 80 Discuss
Ratio and Proportion problems
Search Results
Correct Answer: 12 : 35
Explanation:
Given that, a/b = 3/5, b/c = 4/7
? a/c = a/b x b/c = 3/5 x 4/7 = 12/ 35
&there4: a : c = 12 : 35
Correct Answer: a2 : c2
Explanation:
Given that a /b = b/c
? b2 = ac
? a4 : b4 = a4 : a2 c2 = a2 : c2
Correct Answer: 19 : 17
Explanation:
Required inverses ratio of 17 : 19 = (1/17) : (1/19) = 19 : 17
Correct Answer: 343 : 125
Explanation:
Required triplicate ratio of 7 : 5 = 73 : 53
= 343 : 125
Correct Answer: 9 : 8
Explanation:
Required sub - duplicate ratio of 81 : 64 = ?81 : ?64 = 9 : 8
Correct Answer: 7 : 9 : 11
Explanation:
Let a/7 = b/9 = c/11 = K
Then, a = 7K, b = 9K, c = 11K
? a : b : c = 7K : 9K : 11K = 7 : 9 : 11
Correct Answer: 2 : 3
Explanation:
Given that, 30 % of A = 20 % of B
? A/B = 20/30 = 2/3
? A : B = 2 : 3
Correct Answer: 8 : 9 : 24
Explanation:
Given that, P : Q : R = 2 : 3 : 4
Let P = 2K, Q = 3K, R = 4K
? P/Q = 2K/3K = 2/3,
Q/R = 3K/4K = 3/4,
R/P = 4K/2K = 2/1
? P/Q : Q/R : R/P = 2/3 : 3/4 : 2/1
= (2 x 12)/3 : (3 x 12)/ 4 : (2 x 12)/1
= (2 x 4) : (3 x 3) : 24
= 8 : 9 : 24
Correct Answer: 1 : 4 : 8
Explanation:
Given that, A = B/4
? A/B = 1/4 or A : B = 1 : 4
Also, B = C/2 or B/C = 1/2 or B : C = 1 :2
Now, we have A : B = 1 : 4; B : C = 1 : 2
A : B : C = ( 1 x 1 ) : ( 1 x 4 ) : ( 2 x 4 )
= 1 : 4 : 8
Correct Answer: 9 : 80
Explanation:
Given that 0.8 x A = 0.09 x B
? A/B = 0.09/0.8 = 9/80
? A : B = 9 :80
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