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- Question
What is the third proportional to 9 and 45?
Options- A. 405
- B. 225
- C. 5
- D. 81
- Correct Answer
- 225
- 1. If (2a + 3b)/(5a - 3b) = 23/5 , then the value of ba is ?
Options- A. 5
- B. 4
- C. 20
- D. 28 Discuss
- 2. 6 pumps of kirlosker can fill a tank in 7 days and 2 similar pumps of USHA can fill the same tank in 18 days. what is the ratio of the efficiency of a kirlosker pump and a USHA pump?
Options- A. 6:7
- B. 7:6
- C. 7:54
- D. None of these Discuss
- 3. The ratio of number of cans of orange, pineapple and mixed fruit juices kept in a store is 8 : 9 : 15. If the store sells 25%, 33.33% and 20% of orange, pineapple and mixed fruit juices cans respectively, then what is the ratio of number of cans of these juices in the remaining stock?
Options- A. 1 : 1 : 2
- B. 6 : 6 : 13
- C. 12 : 15 : 19
- D. 4 : 9 : 13 Discuss
- 4. Rajitha invested 25% more than Santhosh. Santhosh invested 30% less than Raju, who invested Rs. 6,000. What is the ratio of the amount that Rajitha invested to the total amount invested by all of them together ?
Options- A. 25 : 114
- B. 35 : 103
- C. 15 : 108
- D. 41 : 94 Discuss
- 5. At the university entrance exam, a candidate is admitted according to whether he has passed or failed the test. Of the candidates who are really capable, 80 % pass the test and of the incapable, 30 % pass the test. Given that 40 % of the candidates are really capable, then the proportion of the really capable students who can pass the test to the total students who can pass is about ?
Options- A. 11/24
- B. 1/5
- C. 16/25
- D. 6/5 Discuss
- 6. The ratio of two numbers is 2 : 3. If the sum of both the numbers is 75, then what is the larger number among both the numbers?
Options- A. 45
- B. 30
- C. 50
- D. 48 Discuss
- 7. Visitors to a show were charged Rs. 15 each on the first day, Rs. 7.50 on the second day, Rs. 2.50 on the third day and total attendance on three days were in the ratio 2:5:13 respectively. The average charge per person for the entire three days is
Options- A. Rs. 5
- B. Rs. 5.50
- C. Rs. 6
- D. Rs. 7 Discuss
- 8. Which of the following could not be the lengths of the sides of a right angled triangle?
Options- A. 3, 4, 5
- B. 5, 12, 13
- C. 8, 15, 17
- D. 12, 15, 18 Discuss
- 9. There are 209 doctors and nurses in a hospital. If the ratio of the doctors to the nurses is 11 : 8, then how many nurses are there in the hospital?
Options- A. 88
- B. 96
- C. 108
- D. 121 Discuss
- 10. Find the fourth proportional to 2, 3, 6.
Options- A. 9
- B. 10
- C. 7
- D. 8 Discuss
Ratio and Proportion problems
Search Results
Correct Answer: 20
Explanation:
Given (2a + 3b)/(5a - 3b) = 23/5
=> 10a + 15b = 115a - 69b
=> 105a = 84b => 5a = 4b
a/b = 4/5 => a=4 & b=5
=> bxa = 5x4 = 20.
Correct Answer: 6:7
Explanation:
The number of days required by a single kirlosker pump to fill the tank = 6 x 7 =42 days and the number of days required by a single USHA pump to fill the same tank = 2 x 18 =36 days.
Now , since efficiency is inversely proportional to the number of days. Hence,
Correct Answer: 1 : 1 : 2
Correct Answer: 35 : 103
Explanation:
Santhosh's investment = 6000 x 70/100 = Rs.4200
Rajitha's investment = 4200 x 5/4 = Rs.5250
Therefore, total amount invested = 6000 + 4200 + 5250 = Rs.15450.
Required ratio = 5250 : 15450 = 35 : 103.
Correct Answer: 16/25
Explanation:
If there are total 100 candidates,
40 candidates are really capable and
60 candidates are incapable.
Of the candidates who are really capable = 80%
40*(80/100)=32 pass the test and
of the incapable= 30%
60*(30/100)=18 pass the test.
Total candidates who passed the test = 32+18 = 50
The proportion of the really capable students who can pass the test to the total students who can pass = 32/50 = 16/25.
Correct Answer: 45
Correct Answer: Rs. 5
Correct Answer: 12, 15, 18
Explanation:
Using Pythagoras theorem we can see that 122 + 152 is not equal to 182
Neither is 102 + 242 = 252
Correct Answer: 88
Explanation:
Given,
The ratio of the doctors to the nurses is 11 : 8
Number of nurses = 8/19 x 209 = 88.
Correct Answer: 9
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