Question 1117688
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The first tutor addingup gave a rather cryptic response showing the first part of one method for finding the answer to the question; I don't know if you saw where he was going with his solution and were thus able to finish the problem.<br>
Tutor MathTherapy then provided his usual response containing only a criticism of  the other tutor's response, without any help to you about how to solve the problem.  His response also obviously indicates he doesn't understand the approach the first tutor was taking on the problem.<br>
So the first tutor showed you what the total amount would be after 4 years at 5% and suggested that you do the same computation for 10%; then the difference would be the difference between the two amounts.<br>
The computation can be done more easily.<br>
Because it is simple interest, the difference between the amounts at the end of 4 years is just the difference in the amount of interest at 5% and at 10%.  And that difference is just the amount of interest on the Rs. 600 at the difference of the two interest rates -- 10%-5% = 5%.<br>
So the answer to the problem, in one calculation is<br>
I = prt:  {{{(600)(.05)(4) = 120}}}<br>
Answer: The difference between simple interest on Rs.600/- for 4 years at the rates of 5% and 10% is Rs.120.