Question

2 yuu.
7. The simple interest on a sum at 4% per annum in 5 years is 256. Find the sum.
La​

Answer 1

Answer:

$simple \: interest = 256 \\ time \: = \: 5 \: year \\ rate \: = 4\%p.a \\ principal \: = \: ? \\ \\ s.i \: = \underline{p \times r \times t} \\ \: \: \: \: \: \: \: \: \: 100 \\ 256 \: = \underline{p\times 4 \times 5} \\ \: \: \: \: \: \: \: \: \: \: \: 100 \\ p \: = \underline{256 \times 100} \\ \: \: \: \: \: \: \: \: \: 4 \times 5 \\ \underline{25,600} \\ 20 \\ = 1280 \: \: \: \: \red{answer}$