If a : b = 3 : 5 and b : c = 4 : 7, then a : c = ?

  1. 11 : 35
  2. 35 : 11
  3. 35 : 12
  4. 12 : 35
vijay Professor Asked on 6th August 2015 in Maths.
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  • 1 Answer(s)

    Answer: (4) 12 : 35
    Explanation:-
    a : b = 3 : 5   & b : c = 4 : 7
    Formula-
    A : B = a : b  & B : C = b : c
    Then,  A : C = a  x b/ b x c
    A : C = a b / b c

    a x b/b x c = 3 x 4 /5 x 7
    a / c = 12 / 35
    Then, a : c = 12 : 35

    Hence, the answer is (4) 12 : 35.

    Anurag Mishra Professor Answered on 6th August 2015.
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