alleryIf 2/5 of a number a equals 1/3 of a number b, then a : b is
- 3 : 5
- 2 : 3
- 5 : 6
- 6 : 5
Show answer and solution
Correct answer: C. 5 : 6
2a/5 = b/3 gives a/b = (1/3)(5/2) = 5/6.
RRB NTPC Ratio and Proportion — practice questions — page 2
Explore 62 free Ratio and Proportion questions in RRB NTPC Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–60 of 62.
If 2/5 of a number a equals 1/3 of a number b, then a : b isRead the answer and worked solution →A school of 1,200 students has boys and girls in ratio 7 : 5. How many more boys than girls are there?Read the answer and worked solution →In a class, boys and girls are in ratio 4 : 5 and girls exceed boys by 12. Total strength isRead the answer and worked solution →Two ropes are in ratio 5 : 8 and the longer is 18 m more than the shorter. The shorter rope isRead the answer and worked solution →Sides of a triangle are in ratio 3 : 4 : 5 and its perimeter is 60 cm. The longest side isRead the answer and worked solution →Two complementary angles are in ratio 4 : 5. The larger angle isRead the answer and worked solution →A rectangle has sides in ratio 5 : 3 and perimeter 64 cm. Its area isRead the answer and worked solution →Sides of two squares are in ratio 3 : 5. The ratio of their areas isRead the answer and worked solution →An alloy of zinc and copper is in ratio 5 : 3. How much zinc is in 40 kg of it?Read the answer and worked solution →A and B invest Rs 6,000 and Rs 9,000. Of a Rs 2,500 profit, A's share isRead the answer and worked solution →A puts Rs 4,000 for 6 months and B Rs 6,000 for 4 months. B's share of Rs 3,000 profit isRead the answer and worked solution →Incomes of A and B are 5 : 4, expenses 3 : 2, and each saves Rs 1,600. A's income isRead the answer and worked solution →Monthly income of Rs 36,000 goes to rent, food and savings in ratio 3 : 4 : 5. Savings areRead the answer and worked solution →Two sisters' ages are in ratio 5 : 7 and the sum four years ago was 40. The elder is nowRead the answer and worked solution →Ages of A and B are 5 : 3. In 9 years the ratio becomes 3 : 2. A's present age isRead the answer and worked solution →A father is thrice his son's age. In 12 years he will be twice as old. Father's age now isRead the answer and worked solution →Old and new prices are in ratio 4 : 5. To keep spending equal, old to new consumption isRead the answer and worked solution →Speeds of A and B are 3 : 4. B needs 2 hours less on the same route. A needsRead the answer and worked solution →On a map with scale 1 : 50,000, 4 cm stands for a real distance ofRead the answer and worked solution →On a map, 1 cm stands for 5 km. A real road of 35 km is drawn asRead the answer and worked solution →In a proportion a : b = c : d, the product of the extremes equals the product ofRead the answer and worked solution →Salaries of P and Q are 3 : 4. P gets a 10% raise and Q a 20% raise. The new ratio isRead the answer and worked solution →Two numbers are in ratio 5 : 3 and their LCM is 150. Their HCF isRead the answer and worked solution →A 36 litre mixture has milk and water in 5 : 1. Water to add for a 3 : 1 ratio isRead the answer and worked solution →If 3 : x = 12 : 20, then x isRead the answer and worked solution →The ratio 3 : 5 expressed as a percentage means the first is what percent of the second?Read the answer and worked solution →A ratio is 7 : 13. The first term is what percent of the total of both terms?Read the answer and worked solution →Boys are 3/8 of a class and number 60. How many girls are there?Read the answer and worked solution →In metrology, a ratio is a dimensionless quotient of two quantities measured inRead the answer and worked solution →A screen has a 4 : 3 aspect ratio and is 32 cm wide. Its height isRead the answer and worked solution →
Worked practice questions
A school of 1,200 students has boys and girls in ratio 7 : 5. How many more boys than girls are there?
- 200
- 250
- 100
- 150
Show answer and solution
Correct answer: A. 200
A part is 100, so boys are 700 and girls 500, a difference of 200.
In a class, boys and girls are in ratio 4 : 5 and girls exceed boys by 12. Total strength is
- 104
- 100
- 108
- 96
Show answer and solution
Correct answer: C. 108
One part is 12, so the class has 9 x 12 = 108 students.
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