If A lends Rs. 3500 to B at 10% p.a. and B lends the same sum to C at 11.5% p.a., then the gain of B (in Rs.) in a period of 3 years is  Pick one.
A) Rs. 154.50 B) Rs. 155.50 C) Rs. 156.50 D) Rs. 157.50 E) None of these
Explanation:   We need to calculate the profit of B.   It will be,   SI on the rate B lends - SI on the rate B gets   Gain of B=3500×11.5×3/100−3500×10×3/100   =157.50   Option Rs. 157.50
<result>D</result>
If A lends Rs. 3500 to B at 10% p.a. and B lends the same sum to C at 11.5% p.a., then the gain of B (in Rs.) in a period of 3 years is