RRB NTPC Mains or Stage 2 Model Paper 7 with solutions

(b) Let uncle’s present age = x
Rahim's present age = y
y – x = 30 ...(i)
(a)fter 7 year
(x + 7) + (y + 7) = 66
x + y + 14 = 66
x + y = 52 ...(ii)
combining (i) and (ii) we get
(x + y = 52) + (x – y = 30)
2x = 82
x = 41
Uncle's age is 41