1) Shyam lent Rs. 600 for 2 years and Rs. 200 for 3 years, at the same rate at simple interest, and received Rs. 90 as total interest. What was the rate % p.a. ? A) 12% B) 5% C) 6% D) 4% E) None Answer: Option BExplanation:Total SI =P1T1R100 +P2T2R100 R = rate % which is the same in both cases. ⇒600×2×R100 +200×3×R100 =90 12R+6R =90 ⇒18R=90 ⇒R = 5%