A money lender lent Rs. 1000 at 3% per year and Rs. 1200 at 5% per year. The amount should be returned to him when the total interest comes to Rs. 350. Find the number of years. Pick one
A) 3.5 B) 3.75 C) 3.88 D) 4.25 E) 4.5

Rationale: ( 1000 xtx 3 / 100 ) + ( 1200 xtx 5 / 100 ) = 350 â † ’ t = 3.88 answer c
Answer: C