Question

5. Find the principal that will amount to *720 in 3 years at 6% per annum.

6. in what time a sum of money will be one and half times of itself at 12%
per annum?​

Answer 1

Answer:

5.Let the principal amount be P.

SI=P(6)(3)/100+P=720

18P/100+P=720

118P/100=720

P=720×100=610.16

6.Let the principal amount be P

New amount=3/2P

Let the time taken be t

P + ( P×t×12)/100=3/2P

12P/100×t=P/2

t=P/2×100/12P

t=25/6