A sum was put at simple interest at a certain rate for 10 years . Had it been put at 5% higher rate , it would have fetched Rs.300 more. What was the Sum? Choose the correct choice from the following choices:
A) s.1200 B) s.1300 C) s.600 D) s.800 E) s.1200
At 5% more rate, the increase in S.I for 10 years = Rs.300 (given)   So, at 5% more rate, the increase in SI for 1 year = 300/10 = Rs.30/-   i.e. Rs.30 is 5% of the invested sum   So, 1% of the invested sum = 30/5   Therefore, the invested sum = 30 × 100/5 = Rs.600 Answer: s.600
<result>C</result>
A sum was put at simple interest at a certain rate for 10 years . Had it been put at 5% higher rate , it would have fetched Rs.300 more. What was the Sum?