Option 1 : Rs. 25000

**Given:**

Karim took some amount of money from Vishal at the rate of 10% per annum at simple interest for 3 years.

Karim lent it to Vikash at the rate of 15% per annum simple interest for 3 years.

Total profit earned by Karim was Rs. 3750.

**Formula used:**

S.I. = P × R × T/100

A = P (1 + R × T/100)

**Calculation:**

Let Karim took Rs. x from Vishal.

So, the simple interest paid by Karim to Vishal = (x × 10 × 3)/100 = 3x/10

Simple interest paid by Vikash to Karim = (x × 15 × 3)/100 = 9x/20

According to question,

Profit of Karim is Rs. 3750

So, 9x/20 - 3x/10 = 3750

⇒ 3x/20 = 3750

⇒ x = Rs. 25000