Ratio & Proportion (Railway Maths) (Part – II)

Total Questions: 50

21. Find the fourth proportional of 12, 24 and 45. [Group D 24/08/2022 (Afternoon)]

Correct Answer: (a) 90
Solution:

22. If a / b = 4 / 3 and 3a + 2b = 24, then find the value of a. [Group D 24/08/2022 (Afternoon)]

Correct Answer: (d) 16/3
Solution:

23. If x : y = 7 : 3, then (x² + y²) : (x² - y²) = ? [Group D 25/08/2022 (Morning) ]

Correct Answer: (a) 29 : 20
Solution:

24. Find the fourth proportional of 4a + 7, 11a + 3 and 6a, if a = 2. [Group D 25/08/2022 (Afternoon)]

Correct Answer: (a) 20
Solution:

25. An amount is divided between two friends in the ratio 2 : 5. If the second part is ₹6 more than the first, then the initial amount is : [Group D 25/08/2022 (Afternoon)]

Correct Answer: (d) ₹14
Solution:

26. Find the mean proportional between 17 and 68. [Group D 25/08/2022 (Evening)]

Correct Answer: (c) 34
Solution:

27. A sum of money is distributed among four persons A, B, C and D in the ratio 4 : 7 : 9 : 3. If C gets ₹800 more than B, then find the amount that D gets. [Group D 26/08/2022 (Morning)]

Correct Answer: (d) ₹1,200
Solution:

28. If (2x + 7y) : (4x - 3y) :: 8 : 3, then find the value of x : y. [Group D 26/08/2022 (Afternoon)]

Correct Answer: (a) 45 : 26
Solution:

29. In a class there are 40 students (only boys and girls). The number of girls is three-sevenths of the number of boys. Find the number of boys in the class. [Group D 29/08/2022 (Afternoon)]

Correct Answer: (a) 28
Solution:

30. The ratio of the number of boys to that of the girls in a school is 7 : 9. If the number of girls in the school is 189, then the number of boys in that school is : [Group D 29/08/2022 (Evening)]

Correct Answer: (c) 147
Solution: