A sells a radio to B at a gain of 10% and B sells to c at a gain of 5%.If C pays Rs.462 for it,what did it cost to A?
Options
A) 200 B) 300 C) 100 D) 400 E) 500
Solution   C.P of radio to C=C.P of radio to A * (1+10/100)(1+5/100)   =&gt; 462=C.P of radio to A * 110/100 *105/100   =&gt;C.P of radio to A=(462*100*100)/(105*110)= 
<gadget id="calculator">(462*100*100)/(105*110)</gadget>
<output>400</output>
400   Answer 400
<result>D</result>
A sells a radio to B at a gain of 10% and B sells to c at a gain of 5%.If C pays Rs.462 for it,what did it cost to A?