Question

rohan lent rs 28000 to his two friends he give rs 10000at 10%p.a. simple interest to one of his friend and the remaining to other at 12% p.a. how much interest did he receive after 2 year

Answer 1

Case 1
Rs. 10000 (P)
10%p.a.(R)
2 years (T)
$simple \: interest \: \: = \frac{prt}{100} \\ = \frac{10000 \times 10 \times 2}{100} \\ = 2000$

Case 2
Rs. 18000 (P)
12%p.a. (R)
2 years (T)

$simple \: interest \: = \frac{prt}{100} \\ = \frac{18000 \times 12 \times 2}{100} \\ = 4320$
$total \: simple \: interest \: = 2000 + 4320 \\ = 6320 (ans)$
hope this will help