Question

The difference between the interest of rupees 1500 at 4%p.a. and rupees 1400 p.a. for the same time is rupees 30.find the time.

Answer 1

formula to find the simple interest =  P R T / 100

1500 X 4 X T     -    1400 X 4 X T     = 30

     100                             100

60 T    -  56 T           = 30

                    4 T      = 30

                       T  = 30/4   =  15/2

                      T  =  7 1/2 years

(Note: for 1400 rs. rate of interest is not given, so i assume it is same and done)

Answer 2

Answer:

Answer is 15/82 years .

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