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​If i=73ji=\frac{7}{3}ji=37​j​ and j=45kj=\frac{4}{5}kj=54​k​, then the ratio of i:j:ki:j:ki:j:k​ is :​
Question

If i=73ji=\frac{7}{3}j and j=45kj=\frac{4}{5}k​, then the ratio of i:j:ki:j:k is :

A.

28 : 4 : 15

B.

28 : 12 : 15

C.

7 : 12 : 5

D.

21 : 12 : 20

Correct option is B

Given:

i=(73)j j=(45)ki = (\frac{7}{3})j \\\ \\j = (\frac{4}{5})k​​

Solution:

i    :   j    ,              j   :  k 

(7 :  3 ) x4       (4   :    5 ) x 3  

28   : 12            12   :   15 

i   :   j   :  k 

28 :  12  : 15  

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