A rectangular tile has dimension 40 cm x 20 cm. If the length and breadth of the tile is increased
by 5%, what is the percentage increase in the area of the tile?
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Answer:
Given, length = 40 cm and breadth = 20 cm
Area = 40 * 20 = 800 cm sq
According to question, new length = 40 * 1.05 = 42 cm
new breadth = 20 * 1.05 = 21 cm
New area = 42 * 21 = 882 cm sq
% increase in area = [(New area - Old area) / Old Area] * 100
= [(882 - 800)/ 800 ] * 100
= 10.25 %
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