If a/b=7/9, b/c=3/5, then the value of a:b:c is :

  1. 7:9:5
  2. 21:35:45
  3. 7:9:15
  4. 7:3:15
Anurag Mishra Professor Asked on 20th December 2015 in Maths.
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1 Answer(s)

Answer: (3) 7: 9: 15

Solution:-
a/b = 7/9
Then, a: b = 7: 9

b/c = 3/5
Then, b: c = 3: 5

The ratio of a: b: c = 7 x 3: 9 x 3: 9 x 5
 21: 27: 45
7: 9: 15

Then, the value of a: b: c is 7: 9: 15.

Hence, the correct answer is option (3) 7: 9: 15. 

Anurag Mishra Professor Answered on 20th December 2015.
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