The simple interest on a sum of money will be Rs. 600 after 10 years. If the principal is trabled after 5 years which will be the total interest at the end of the tenth year?
Options:
A .  Rs. 600
B .  Rs. 900
C .  Rs. 1200
D .  data inadequate
Answer: Option C
Sum= Rs.x. S.I= Rs. 600 Time= 10 years Rate= = (6000/x)% per annum. S.I on Rs. X for 1st five years = Rs. (x X 6000/x X 5 X 1/100) = Rs. 900 Total interest = Rs. (300+900) = Rs. 1200
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