If 5A = 4B, 7B = 3C and 2C = 7D, then A

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Target Exam

CUET

Subject

General Aptitude Test

Chapter

Numerical Ability

Topic

Ratios

Question:

If 5A = 4B, 7B = 3C and 2C = 7D, then A : D is :

Options:

5 : 6

5 : 7

2 : 1

6 : 5

Correct Answer:

6 : 5

Explanation:

5A = 4B, ⇒ B = 5A/4

7B = 3C ⇒ C = 7B/3 = 35A/12

2C = 7D, ⇒ D = 2C/7 = 70A/84

84 D = 70 A

10A = 12D

A:D = 12:10 = 6:5

The correct answer is Option (4) → 6 : 5