Question

A sum yields an interest of Rs. 900 at 15% simple interest per annum in 4 years. Find the sum.

Answer 1

`15`

`i \: = prt \\ p = \: (i)/(rt) \: \: \: \: \: \: i = 900 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: r = 15 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: t = 4 \\ p = (900)/(15 * 4) \\ = (900)/(60) \\`

`p = (30)/(2) \\ = 15`