By selling a watch for Rs.720/-, a man loses 20% what is that watch cost price  Pick one:
A) s. 700/-	B) s. 800/-	C) s. 880/-	D) s. 900/-	E) s. 990/-
80 % ------&gt; 720 (80 * 9 = 720)   100 % ------&gt;900 (100 * 9 = 900)   Cost price = Rs. 900/-   s. 900/-
<result>D</result>
By selling a watch for Rs.720/-, a man loses 20% what is that watch cost price