Calculate the simple interest on
(a) Rs. 5235 at 8% per annum for 1 year and 8 months.
(b) Rs. 8125 at `14(2)/(5)` per annum for 2 years and 3 months.

Explanation

(a) Given that,
Principal (P)=Rs. 5235,
Rate (R )=8% per annum and
Time period (T)=1 year and 8 months `=1(8)/(12)` years `=1(2)/(3) " years"=(5)/(3)` years
`therefore` Simple interest `=(PTR)/(100)=(5235xx(5)/(3)xx8)/(100)=698`
Hence, simple interest = Rs. 698
(b) Given,
Principal (P)= Rs. 8125,
Rate (R )`=14(2)/(5)%=(72)/(5)%`
Time period (T)=2years and 3 months `=2(3)/(12) " years" =2(1)/(4) " years" =(9)/(4)` years
`therefore` Simple interst `=(PTR)/(100)=(8125xx(9)/(4)xx(72)/(5))/(100)=2632.50`
Hence, simple interest =Rs. 2632.50