If a man reduces the selling price of a fan from Rs. 420 to Rs. 402, his loss increases by 3%. The cost price of the fan is : Pick one.
A) Rs.600  B) Rs.650  C) Rs.475  D) Rs.525  E) None of these
Explanation :   Solution: let C.P. be Rs. X. then, 3% of x = (420-402)= 
<gadget id="calculator">(420-402)</gadget>
<output>18</output>
18=&gt; 3x/100 = 18 =&gt; x =Rs.600.   Rs.600nswer : Rs.600
<result>A</result>
If a man reduces the selling price of a fan from Rs. 420 to Rs. 402, his loss increases by 3%. The cost price of the fan is :