Question

In what rate of interest per annum will asum of rs 8000 amount to rs 9260 in 3 1/2 years

Answer 1

$a = p + si$
$si = prt \div 100$
Therefore, 9260 = 8000+8000*r*1/200
9260 = 8000+40*r
9260-8000 = 40r
1260 =40r
1260/40 = r
63/2 =r
31.5%=rate