The difference between the simple and compound interest on a certain sum of mone

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The difference between the simple and compound interest on a certain sum of money for 2 years at 4% per annum is 4. The sum is

Options:

A . 2,000

B . 2500

C . 2,600

D . 2,400

Answer: Option B
Answer: (b)Using Rule 6,Sum = Difference$(100/r)^2$= 4 × $(100/4)^2$ = Rs.2500

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