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

Total Questions: 50

41. The ratio of the areas of a square and a regular hexagon, both inscribed in a circle, is: [RRB ALP 13/08/2018 (Afternoon)]

Correct Answer: (c) 4 : 3√3
Solution:

42. There are red (A), yellow (B) and green (C) tokens in a bag. [RRB ALP 13/08/2018 (Evening)]

A : B = 3 : 8, B : C = 6 : 13. A : B : C is given by:

Correct Answer: (d) 9 : 24 : 52
Solution:

43. In a bag, the ratio of red balls to green balls is 4 : 9. If 6 more green balls were added to the bag, the ratio of red balls to green balls would become 1 : 3. How many red balls are there in the bag? [RRB ALP 14/08/2018 (Morning) ]

Correct Answer: (b) 8
Solution:

44. A bag contains coins of denomination ₹1 ₹5 and ₹10. Assuming there are equal number of ₹1, ₹5 and ₹10 coins, what will the total number of coins in the bag be if the total money is ₹ 368? [RRB ALP 14/08/2018 (Evening) ]

Correct Answer: (d) 69
Solution:

45. Some one rupee, 50 paisa and 25 paisa coins make up rupees 93.75 and their numbers are in the proportion of 3 : 4 : 5. Find the number of each type of coins. [RRB ALP 17/08/2018 (Afternoon)]

Correct Answer: (a) 45, 60, 75
Solution:

46. The ratio of the number of marbles that Joyee and Minati had was 5 : 8, while the ratio of the number of marbles that Jacob and Minati had was 7 : 12. What is the ratio of the number of marbles that Joyee and Jacob had? [RRB ALP 20/08/2018 (Afternoon)]

Correct Answer: (c) 15 : 14
Solution:

It is given that : Ratio of the no of marbles that Joyee and Minati had
= 5 : 8 Ratio of the no of marbles that Minati and Jacob had = 12 : 7 So, the ratio of number of marbles that Joyee and Jacob = 5 × 12 : 8 × 7 = 60 : 56 = 15 : 14

47. The ratio of the number of marbles that Pulak and Menaja had was 5 : 9, while the ratio of the number of marbles that Jairam and Menaja had was 7 : 18. What is the ratio of the number of marbles that Pulak and Jairam had? [RRB ALP 21/08/2018 (Evening)]

Correct Answer: (a) 10 : 7
Solution:

Balancing the given ratio, we have ; Pulak : Menaja = 5 : 9 × 2 = 10 : 18 Jairam : Menaja = 7 : 18 Now, the ratio of the number of marbles that Pulak and Jairam had = 10 : 7

48. Find the answer of given question? [RRB ALP 29/08/2018 (Evening) ]

Correct Answer: (d)
Solution:

49. In a class consisting of boys and girls, there are 45 students. If three fifth of the students are boys, find the number of boys in the class. [RRB ALP 30/08/2018 (Morning) ]

Correct Answer: (b) 27
Solution:

Number of boys in the class = 3/5 × 45 = 27

50. Two partners M and N buy a car. M pays his share of 3/7th of the total cost of the car. M pays ₹ 31,540 less than N. What is the cost of the car? [RRB ALP 31/08/2018 (Evening) ]

Correct Answer: (a) ₹ 2,20,780
Solution: