Question

a sum of money lent out at simple intrest amounts to rs.2880 in 2 years and to rs.3600 in 5 years find the sum of money and the rate of intrest ?

Answer 1

rate is 10%

3600-2880=720

720 is SI  for 3 years so SI for 1 year =720/3=240

now 2880 is amount after 2 years

so Sum before 2 years will be 2880-240-240=2400

ans SI is 240 for each year as SI remains same for each consecutive years.

rate is (240/2400)*100=10

Answer 2

Answer:

rate =10%

Step-by-step explanation:

3660_2880=720

S.I for 3years =720

S.I for 1 years=720/3

=240

Amount =2880

Time =2years

so sum be of 2 years

=240 + 240 =480

=2880 _480

=2400

Rate - (240/2400)*100

=10