Question of the day 11-11-2016

Question of the day:

A building worth Rs. 72,900 is constructed on the land worth Rs. 121000.After how many years will through value of the both be the same, if the building appreciate at 10% p.a. and the land depreciates at 10% p.a. ?

a) 3        b) 4           c) 2          d) None