(A) 16.2 Years
(B) 17.7 Years
(C) 18.2 Years
(D) 15.4 Years
Correct Option is: C
Let John present age be x
John age before 15 years = (x – 15)
John age after 30 years = (x + 30)
We are given that,
John age after 30 years (x + 30) is 15 times his age 15 years back (x – 15)
Therefore,
(x + 30) = 15 (x – 15)
Solving the equation, we get
x + 30 =15x –225
14x = 255
x = 18.2 years