If A lends Rs.3500 to B at 10% per annum and B lends the same sum to C at 15% per annum then the gain of B in a period of 3 years is?  Choose the correct choice from the following answers
A) 525 B) 500 C) 510 D) 530 E) 550
(3500*5*3)/100= 
<gadget id="calculator">(3500*5*3)/100</gadget>
<output>525</output>
&gt; 525   525nswer: 525
<result>A</result>
If A lends Rs.3500 to B at 10% per annum and B lends the same sum to C at 15% per annum then the gain of B in a period of 3 years is?