Final answer:
To calculate the simple interest on ₹1020 at an annual rate of 5% over 4 years using the simple interest formula, we get ₹204. This value was rounded to the nearest tens for the given options, so the nearest available answer is ₹240. Hence, the correct option is (b) ₹240.
Step-by-step explanation:
To find the simple interest on ₹1020 at an annual rate of 5% for 4 years, we need to use the simple interest formula. The formula for calculating simple interest is:
Simple Interest = Principal (P) × Rate (R) × Time (T)
Given in the question, the principal (P) is ₹1020, the rate (R) is 5%, and the time (T) is 4 years.
Now we convert the percentage rate to a decimal by dividing it by 100:
Rate (R) as a decimal = 5% ÷ 100 = 0.05
Next, we plug in the values into the formula:
Simple Interest = ₹1020 × 0.05 × 4
Simple Interest = (₹1020 × 0.05) × 4 = ₹51 × 4 = ₹204
The simple interest earned over 4 years is ₹204. Therefore, the correct answer is (b) ₹240 rounded to the nearest tens.