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- Question
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
- Correct Answer
- 12, 15, 18
ExplanationUsing Pythagoras theorem we can see that 122 + 152 is not equal to 182
Neither is 102 + 242 = 252 - 1. 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
- 2. 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
- 3. What is the third proportional to 9 and 45?
Options- A. 405
- B. 225
- C. 5
- D. 81 Discuss
- 4. If (2a + 3b)/(5a - 3b) = 23/5 , then the value of ba is ?
Options- A. 5
- B. 4
- C. 20
- D. 28 Discuss
- 5. 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
- 6. 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
- 7. Find the fourth proportional to 2, 3, 6.
Options- A. 9
- B. 10
- C. 7
- D. 8 Discuss
- 8. A truck covers a distance of 550 metres in one minute where as a bus covers a distance of 33 km in 3/4 hours. Then the ratio of their speeds is :
Options- A. 1:3
- B. 2:3
- C. 3:4
- D. 1:4 Discuss
- 9. A shopkeeper earns a profit of 15% after selling a book at 20% discount on the printed price . The ratio of the cost price and printed price of the book is
Options- A. 20:23
- B. 23:20
- C. 16:23
- D. 23:16 Discuss
- 10. x and y are two numbers such that their mean proportion is 8 and third proportion is 512. What is the value of x and y?
Options- A. 2 and 16
- B. 2 and 32
- C. 4 and 32
- D. 4 and 16 Discuss
Ratio and Proportion problems
Search Results
Correct Answer: Rs. 5
Correct Answer: 45
Correct Answer: 225
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: 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
Correct Answer: 3:4
Correct Answer: 16:23
Correct Answer: 2 and 32
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