Discussion
Home ‣ Aptitude ‣ Ratio and Proportion Comments
- Question
- If 1/x : 1/y : 1/z = 2 : 3 : 5, then determine x : y : z .
Options- A. 6 : 15 : 10
- B. 3 : 15 : 10
- C. 15 : 3 : 10
- D. 15 : 10 : 6
- Correct Answer
- 15 : 10 : 6
ExplanationLet 1/x = 2K, 1/y = 3K and 1/z = 5K
Then, x = K/2, Y = K/3 and z = K/5
? x : y : z = K/2 : K/3 : K/4
= 1/2 : 1/3 : 1/5
= 15 : 10 : 6 - 1. 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
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. If a/3 = b/8, then ( a + 3 ) : ( b + 8 ) is equal to?
Options- A. 3 : 8
- B. 8 : 3
- C. 5 : 8
- D. 3 : 5 Discuss
- 7. If 1/2 of A = 2/5 of B = 1/3 of C, then A : B : C is equal to?
Options- A. 4 : 5 : 6
- B. 6 : 4 : 5
- C. 5 : 4 : 6
- D. 4 : 6 : 5 Discuss
- 8. If xy =36, then which of the following is correct?
Options- A. x : 9 = 4 : y
- B. 9 : x = 4 : y
- C. x :17 = y : 7
- D. x : 6 = y : 6 Discuss
- 9. The total number of students in school is 2140. If the number of girls in the school is 1200, then what is the ratio of the total number of boy to the total number of girls in the school?
Options- A. 26 : 25
- B. 47 : 60
- C. 18 : 13
- D. 31 : 79 Discuss
- 10. The speed of three cars in the ratio of 2 : 3 : 4 Find the ratio between the time taken by these cars to cover the same distance?
Options- A. 2 : 3 : 4
- B. 4 : 3 : 2
- C. 4 : 3 : 6
- D. 6 : 4 : 3 Discuss
Ratio and Proportion problems
Search Results
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
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: 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: 2 : 3
Explanation:
Given that, 30 % of A = 20 % of B
? A/B = 20/30 = 2/3
? A : B = 2 : 3
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: 3 : 8
Explanation:
Let a/3 = b/8 = K
Then, a = 3K, b = 8K
? (a + 3) / (b + 8) = (3K + 3) / (8K + 8)
= [3( K + 1)] / [8(K+1)] = 3/8
? ( a + 3 ) : (b + 8) = 3 : 8
Correct Answer: 4 : 5 : 6
Explanation:
1/2 of A = 2/5 of B = 1/3 of C
1/2 x A = 2/5 x B = 1/3 x C
Let A/2 = 2B/5 = C/3 = K
Then, A = 2K, B = 5K/2, C = 3K
? A: B : C = 2k : 5k/2 : 3k
? A: B : C = 4 : 5 : 6
Correct Answer: x : 9 = 4 : y
Explanation:
xy =36
? xy = 4 x 9,
? x/9 = 4/y
? x : 9 = 4 : y
Correct Answer: 47 : 60
Explanation:
Number of boy = ( 2140 - 1200 ) = 940
? Boys : Girls = 940 : 1200 = 47 : 60
Correct Answer: 6 : 4 : 3
Explanation:
Ratio of Speed = 2 : 3 : 4
Ratio of time taken = (1/2) : (1/3) : (1/4) = 6 : 4 : 3
Comments
There are no comments.More in Aptitude:
Programming
Copyright ©CuriousTab. All rights reserved.