A man buy a book in Rs50 & sale it Rs80. What is the rate of profit ??? Pick one:	A) 10%	B) 60%	C) 30%	D) 25%	E) 28%
cp=50   sp=80   profit=80-50= 
<gadget id="calculator">80-50</gadget>
<output>30</output>
30   %=30/50*100= 
<gadget id="calculator">30/50*100</gadget>
<output>60</output>
60%   ANSWER:60%
<result>B</result>
A man buy a book in Rs50 & sale it Rs80. What is the rate of profit ???