Given: Rate of interest = 9.5% Amount after 6 years = Rs 942 Concept used: Simple Interest, SI = PNR/100 Where P = principal, R = rate of interest and N = time Amount = SI + P Calculation: SI = Amount - P ⇒ (942 – P) = (P × 9.5 × 6) /100 ⇒ 94200 – 100P = 57P ∴ P = Rs. 600 ∴ The amount invested initially is Rs 600.