If a:b=2:3 and b:c=5:7, then a:c=?

(a) 10:21
(b) 21:10
(c) 5:7
(d0 10:5

Anurag Mishra Professor Asked on 16th May 2016 in Maths.
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  • 1 Answer(s)

    Answer:  (a) 10: 21 

    Solution:-
    a: b = 2: 3  and b: c = 5: 7
    Then, a: b: c = 2 x 5: 7 x 2: 7 x 3
     = 10: 14: 21 

    So, the ratio of a: c = 10: 21. 

    Hence, the correct answer is option (a) 10: 21. 

    Anurag Mishra Professor Answered on 18th May 2016.
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