Question

a sum of money trebles itself in 15 years 6 months. in how many years would it double itself

Answer 1

Sum trebles in 15 years 6 months

Lets convert whole in months only

So 15*12 = 180 + 6 = 186 months

3 times in = 186 months

1 time in = 186/3 = 62

Doubles in 62*2 = 124 months

124/12 = 10 1/3 years