The problem
VWXY is a rectangle with length 20cm and width 12cm.The length of the rectangle is increased by 30%. The width of the rectangle is increased by 10%. Find the percentage increase in the area of the rectangle.
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VWXY is a rectangle with length 20cm and width 12cm.The length of the rectangle is increased by 30%. The width of the rectangle is increased by 10%. Find the percentage increase in the area of the rectangle.
=> Area of the original rectangle = 20cm x 12cm = 240cm square.
=> Length ( 20cm) increased by 30% ( 100+30= 130% = 1.3)
=> 20 x 1.3 = 26cm
Width ( 12cm) increased by 10% ( 100+10=110% =1.1)
=> 12 x 1.1 = 13.2
Area of the new rectangle = 26cm x 13.2cm = 343.2 cm square.
Actual change = 343.2 - 240 = 103.2
Answer is 43%