• # question_answer The present ages of two persons are 36 and 50 years respectively, if after n years the ratio of their ages will be 3 : 4, then the value of n is A)  3         B)  4 C)  7                     D)  6

[d] According to question $\frac{36+n}{50+n}=\frac{3}{4}$ $36\times 4+4n=50\times 3+3n$ $4n-\,3n=150-\,144$ $n=6$