Find the cost price of an item if by selling at Rs.900, a profit of 20% is made?  Choose the correct option: A) Rs.780 B) Rs.720 C) Rs.700 D) Rs.750 E) Rs.729
SP = 900   CP = (SP)*[100/(100+P)]   = 900 * [100/(100+20)]   = Rs.720   Answer: Rs.720
<result>B</result>
Find the cost price of an item if by selling at Rs.900, a profit of 20% is made?