The simple interest on a sum of money will be Tk. 600 after 10 years. If the principal is trebled after 5 years, what will be the total interest at the end of the tenth year?

A Tk. 600
B Tk. 900
C Tk. 1200
D Tk. 1500

Correct Answer: Tk. 1200

We know the interest is directly proportional to time and principal. If the total interest for 100 years is Tk. 600, then it is Tk. 300 for the first 5 years. Now, the principal trabled after 5 years. So we get 3 times more interest for the next 5 year's. So instead of Tk. 300 we get Tk.900 So total interest = 300 + 900 = Tk. 1200
Bissoy MCQ
#গণিত #সরল ও যৌগিক মুনাফা  (Simple & Compound interest) #Probashi Kallyan Bank #Probashi Kallyan Bank - Executive Officer (Cash) - 14.02.2014

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