if length of rectangle is increased by 10%, and breadth is decreased by 10%.what will it effect on area of rectangle?
Choose the correct option:
A) it will have no effect B) 1% increase C) 1% decrease D) 2% increase E) 2% decrease
let initial length=l,and breadth=b   area=l*b   new length=l*110%=[l*110/100]=11l/10,new breadth=9b/10   new area=11l/10*9b/10=99/100lb   decrease in area=[lb-99/100lb]=lb/100=% decrease=[lb/100*1/lb*100]=1%   answer 1% decrease
<result>C</result>
if length of rectangle is increased by 10%, and breadth is decreased by 10%.what will it effect on area of rectangle?