Question

an amount of rs 40000 becomes rs 52800 in 4 years at a simple interest of r% p.a. find r. also find the simple interest on rs 60000 for 7 years at the same rate​

Answer 1

Answer:

Step-by-step explanation:

Principal=40000

Amount=52800

Time=4

Interest=A-P=52800-40000=12800

Now

R=l×100/P×T

=12800×100/40000×4

=1280000/160000

=8

R=8%

Then

P=60000

T=7

R=8

I=PTR/100

=60000×7×8/100

=3360000/100

=33600

I=Rs33600