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.400 more. What was the Sum?	Select the correct option:
A) s.1200
B) s.800
C) s.1400
D) s.1000
E) s.920
At 5% more rate, the increase in S.I for 10 years = Rs.400 (given)   So, at 5% more rate, the increase in SI for 1 year = 400/10 = Rs.40/-   i.e. Rs.40 is 5% of the invested sum   So, 1% of the invested sum = 40/5   Therefore, the invested sum = 40 × 100/5 = Rs.800 Answer: s.800
<result>B</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.400 more. What was the Sum?