Question

Radhika and Niharika borrowed rs 21000 and rs 15000 respectively at the same rate of simple interest for 4 years.if Radhika paid rs1440 mor interest Niharika, find the rate of interest bper annum.​

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Radhika borrowed Rs.12000 from her friends. Out of which Rs.4000 were borrowed at 18% and the remaining at 15% rate of interest per annum. What is the total interest after 3 years ?

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Answer

Radhika borrowed =Rs.12000

i. Principal =Rs.4000,

Time =3years

R=18%p.a.

Now,

Interest=

100

4000×18×3

=Rs.2160

ii. Principal =12000−8000=Rs.4000,

Time =3years

R=15%p.a.

Now,

Interest=

100

8000×15×3

=Rs.3600

Total interest =2160+3600=Rs.5760