Question

Please answer the two questions above in the picture pls..... pls...

Answer 1

amount after 18 months=
$5000( \frac{112}{100} )^{ \frac{3}{2} }$
$= 5000 \times \frac{112}{100} \times \sqrt{ \frac{112}{100} }$
=₹5926.482
now he had given 1800*3=₹5400
now to give are 5926.48-5400=₹526.48

Answer 2

Given,

          P = Rs. 5000

          R= 12% per annum = 12 * 1/2 per half year = 6 % per half year

           T = 18 months = 3 half years

We know,

                    Amount = P * [1 + R/100]T

                  ⇒A = 5000 *[1 + 6/100]3

                  ⇒A = Rs.5955080

∴ C.I = A-P

         = 5955080-5000

         = Rs.5950080