1.

Calculate the principal if a sum of money becomes Rs.1200 in 4 years and Rs.1500 in 7 years at simple interest.A. Rs.800B. Rs.600C. Rs.900D. Rs.2001. C2. D3. A4. B

Answer» Correct Answer - Option 3 : A

Given:

Money becomes Rs. 1200 in 4 years

Money becomes Rs. 1500 in 7 years 

Calculation:

According to question

Difference between the money of 7 years and 4 years = 1500 - 1200

⇒ Rs. 300

So, Interest of 3 years = Rs. 300

Now interest of one year = 300/3 = Rs. 100

⇒ Interest of 4 years = 4 × 100 

⇒ Rs. 400

Principal amount = 1200 - 400

⇒ Rs. 800

∴ The Principal amount is Rs. 800



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