11. find the simple interest on a loan of P65,000 if the loan is given at a rate of 20% and is due in 3 years. 12. Amparo invested a certain amount at 10% simple interest per year. After 2 years, the interest she received amounted to P3,000. How much did she invest? 13. Miko borrowed P25,000 at 10% annual interest rate. How much should be pay after 3 years and 6 months? 14 How long will an amount of money triple at a simple interest rate 1% per annum? 15. How long will an amount of P50,000 gain a simple interest of P10,000 at 4% per annum? 16. At what simple interest will an amount of money gain 50% of the principal in