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Question:
30. A man deposited Rs 10000 in a bank at the rate of 5% simple interest annually. Find the amount in 15th year since he deposited the amount and also calculate the total amount after 20 years.
Answer:

Given sum = 10000

Rate of interest = 5%

Now amount in 15th year = 10000 + SI for 15 years

                                     = 10000 + (10000*5*15)/100

                                     = 10000 + 100*75

                                     = 10000 + 7500

                                     = 17500

2. Now amount after 20 years = 10000 + (10000*5*20)/100

                                            = 10000 + 100*100

                                            = 10000 + 10000

                                            = 20000

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