If A lends Rs.4000 to B at 10% per annum and B lends the same sum to C at 11.5% per annum then the gain of B in a period of 3 years is?  Choose one
A) 112.5  B) 122.5  C) 132.5  D) 114.5  E) 180

Rationale: "( 4000 * 1.5 * 3 ) / 100 = > 180 answer : e"
Answer: E