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.150 more. What was the Sum?  Choose the correct choice from the following answers.
A) s.120 B) s.130 C) s.140 D) s.150 E) s.300
At 5% more rate, the increase in S.I for 10 years = Rs.150 (given)   So, at 5% more rate, the increase in SI for 1 year = 150/10 = Rs.15/-   i.e. Rs.15 is 5% of the invested sum   So, 1% of the invested sum = 15/5   Therefore, the invested sum = 15 × 100/5 = Rs.300 Answer: s.300
<result>E</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.150 more. What was the Sum?