Question

A farmer borrowed Rs.2400 at 12% p.a. At the end of 2 ½ years, he declared his account by
paying Rs.1200 and a cow. Find the cost of the cow.

Answer 1

Given P = 2400, R = 12%, n = 5/2 years.

We know that SI = PRT/100

                            = 2400 * 12 * 5/100 * 2

                            = 2400 * 12 * 5/200

                            = 720.


We know that A = P + SI

                            = 2400 + 720

                            = 3120.


Given that he declared his account by paying 1200 rupees.

Then the cost of cow = 3120 - 1200

                                     = 1920.


Therefore the cost of the cow = 1920 rupees.


Hope this helps!

Answer 2

Given

P=2400
R=12%
T=2 1/2yr

=5/2yr

Interest = pxrxt /100

=2400x12x5/100x2

=720

Amout to pay =p+i

=2400+720
=3120

But he gave =1200 cash and a cow

Cost of cow=amount to be payed -payed

=3120-1200

=1920

Cost of cow =₹1920

This is ur ans hope it will help you