Question

In what time will a sum of money double itself at 15% per annun

Answer 1

6.7 years

for ex: the amount be 1000
the interest for rupees 1000 in 6.7 years is
interest= PTR/100
= 1000×6.7×1.5/100
= 1005
total amount = principal amount+interest
= 1000+1005 = 2005