Aptitude - Ratio and Proportion
Exercise : Ratio and Proportion - General Questions
- Ratio and Proportion - Formulas
- Ratio and Proportion - General Questions
11.
The salaries A, B, C are in the ratio 2 : 3 : 5. If the increments of 15%, 10% and 20% are allowed respectively in their salaries, then what will be new ratio of their salaries?
Answer: Option
Explanation:
Let A = 2k, B = 3k and C = 5k.
A's new salary = | 115 | of 2k = | ![]() |
115 | x 2k | ![]() |
= | 23k |
100 | 100 | 10 |
B's new salary = | 110 | of 3k = | ![]() |
110 | x 3k | ![]() |
= | 33k |
100 | 100 | 10 |
C's new salary = | 120 | of 5k = | ![]() |
120 | x 5k | ![]() |
= 6k |
100 | 100 |
![]() |
![]() |
23k | : | 33k | : 6k | ![]() |
= 23 : 33 : 60 |
10 | 10 |
12.
If 40% of a number is equal to two-third of another number, what is the ratio of first number to the second number?
Answer: Option
Explanation:
Let 40% of A = | 2 | B |
3 |
Then, | 40A | = | 2B |
100 | 3 |
![]() |
2A | = | 2B |
5 | 3 |
![]() |
A | = | ![]() |
2 | x | 5 | ![]() |
= | 5 |
B | 3 | 2 | 3 |
A : B = 5 : 3.
13.
The fourth proportional to 5, 8, 15 is:
Answer: Option
Explanation:
Let the fourth proportional to 5, 8, 15 be x.
Then, 5 : 8 : 15 : x
5x = (8 x 15)
x = | (8 x 15) | = 24. |
5 |
14.
Two number are in the ratio 3 : 5. If 9 is subtracted from each, the new numbers are in the ratio 12 : 23. The smaller number is:
Answer: Option
Explanation:
Let the numbers be 3x and 5x.
Then, | 3x - 9 | = | 12 |
5x - 9 | 23 |
23(3x - 9) = 12(5x - 9)
9x = 99
x = 11.
The smaller number = (3 x 11) = 33.
15.
In a bag, there are coins of 25 p, 10 p and 5 p in the ratio of 1 : 2 : 3. If there is Rs. 30 in all, how many 5 p coins are there?
Answer: Option
Explanation:
Let the number of 25 p, 10 p and 5 p coins be x, 2x, 3x respectively.
Then, sum of their values = Rs. | ![]() |
25x | + | 10 x 2x | + | 5 x 3x | ![]() |
= Rs. | 60x |
100 | 100 | 100 | 100 |
![]() |
60x | = 30 | ![]() |
30 x 100 | = 50. |
100 | 60 |
Hence, the number of 5 p coins = (3 x 50) = 150.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers