The side of a rectangale are 20cm and 15cm.If each side is increased by 20/find the percentage increase in the area.
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366.67%
Step-by-step explanation:
Previous area of rectangle: 20×15= 300 cm^2
New length = 20+20 = 40
New breadth = 15+20 = 35
Thus, New area = 40×35 = 1400 cm^2
Now change in area = 1400-300 = 1100cm^2
Percentage increase = 1100/300 × 100 = 366.67%
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