We can start by calculating the interest that Rahul has to pay on the loan.
The formula for simple interest is:
I = P * r * t
where:
- I is the interest
- P is the principal amount (the amount of money Shashwat lent to Rahul)
- r is the annual interest rate (10% per annum, or 0.10)
- t is the time in years (2.5 years)
Substituting the given values, we get:
I = 44000 * 0.10 * 2.5 = Rs 11,000
Therefore, the total amount that Rahul has to pay Shashwat is Rs 44,000 (the principal) + Rs 11,000 (the interest) = Rs 55,000.
However, Rahul paid only Rs 40,000 and a cow. Let's assume the value of the cow is x.
So, the total amount received by Shashwat is:
Rs 40,000 + x
We know that this amount is equal to the total amount that Rahul had to pay, which is Rs 55,000.
Therefore, we can set up an equation:
Rs 40,000 + x = Rs 55,000
Solving for x, we get:
x = Rs 15,000
So the cost of the cow was Rs 15,000.