Simple Interest

Step 1: Understanding the Concept:
The question requires calculating the Simple Interest (SI) for four different cases and then arranging the amounts in descending order (largest to smallest).
Step 2: Key Formula or Approach:
The formula for Simple Interest is:

where P is the Principal amount, R is the Rate of interest per annum, and T is the Time in years.
Step 3: Detailed Explanation:
Let's calculate the SI for each case:
Case (A): P = 6600, R = 5, T = 2

Case (B): P = 200, R = 6, T = 5

Case (C): P = 840, R = 5, T = 4

Case (D): P = 5000, R = 12, T = 2

Now, we compare the SI values:




The decreasing order is , which corresponds to (D) > (A) > (C) > (B).
Step 4: Final Answer:
The correct decreasing order of the simple interests is (D), (A), (C), (B).