Question

55. The percentage increase in the area of a
rectangle, if cach of its sides is increased by
20% is​

Answer 1

Answer:

Let original length = x metres and original breadth = y metres

Originalare=(xy

)m2Newlength=(120100x)m=(65x)mNewbreadth=(120100y)m=(65y)mNewarea=(65x×65y)m2=(3625xy)m2Thedifferencebetweentheoriginalarea = xyandnewarea3625xyis=(3625)xy−xy=xy(3625−1)=xy(1125)or(1125)xy∴Increase%=(1125xy×1xy×100)%=44%