Simple interest on Rs.1000 for 2 years at the rate of 5 per annum is:
Find the simple interest, when:(i) Principal =Rs.2000, Rate of Interest =5% per annum and Time =5 years.(ii) Principal =Rs.500, Rate of Interest =12.5% per annum and Time =4 years.(iii) Principal =Rs.4500, Rate of Interest =4% per annum and Time =6 months.(iv) Principal =Rs.12000, Rate of Interest =18% per annum and Time =4 months.(v) Principal =Rs.1000, Rate of Interest =10% per annum and Time =73 days.
What is the rate of simple interest per annum if, Rs 1000 amounts to Rs 1900 in 3 years?