The age of Ram and Suba are in the ratio 5:6 and after 4 years their ratios are 7:8 then what is the present age of Suba? Answers.
A) 11 B) 12 C) 13 D) 14 E) 15
Let ages of Ram and Suba are R &amp; S respectively, then   R/S = 5/6 =&gt; R = (5/6)*S -------(1)   after 4 years,   (R+4)/(S+4) = 7/8   =&gt; 8R+32 = 7S+28   =&gt; 8*5S/6 = 7S - 4 [from (1)]   =&gt; 20S = 21S - 12   =&gt; S = 12   present age of Suba = S = 12 Years   ANSWER:12
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The age of Ram and Suba are in the ratio 5:6 and after 4 years their ratios are 7:8 then what is the present age of Suba?