There are three numbers. If the ratio of the first to the second number is 2 : 7 and that of the second to the third number is 5 : 8, then the ratio of the first to the third number is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 5 : 28.
The ratio of the first to the second number = (2 : 7) × 5
the ratio of the second to the third number = (5 : 8) × 7
So, the ratio of the first, second, and third = 10 : 35 : 56
The ratio of the first to the third number = 10 : 56 = 5 : 28