The present age of two persons 40 and 54 years respectively. If after n years the ratio of their age will be 5 : 6, then the value of n is.
Answer & explanation
Correct answer: option 4
\(\frac{40+n}{54+n}\) = \(\frac{5}{6}\)
240 + 6n = 270 + 5n
n = 30