Question

the sides of a rectangle are 20 cm and 15cm If each sides of a rectangle is increased by 20% find the percentage increase in the area ​

Answer 1

Answer:

44%

Step-by-step explanation:

let length of the rectangle be=20cm

let breadth of the rectangle be=15cm

now area of the rectangle is length*breadth=20cm*15cm=300cm^2

now each sides is increased by 20%,therefore,

new length of the rectangle=20+(20/100*20)=24cm

new breadth of the rectangle=15+(20/100*15)=18cm

new area of the rectangle=new length*new breadth=24cm*18cm=432cm^2

percentage of increase=300*x/100=432

3x+300=432

3x=432-300

3x=132

x=44%

therefore increase in percentage=44%

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