Question

11. In what time will a sum of money be three times of itself, the rate of interest being,
20% p.a.?​

Answer 1

Simple Interest SI = PNR/100 Given, Amount A = 3 P = > P + SI = 3P = > P + P × N × 20/100 = 3P = > 0.2N = 2 = > N = 10 years