Question

8. The length of a rectangle is 20 cm more than its breadth. If the perimeter is 100 cm, final
the dimension of the rectangle
​

Answer 1

Answer:

Step-by-step explanation:

let the breadth be x.

therefore,length=x+20.

p=100cm

2(x+20+x)=100

4x+40=100

4x=100-40

x=60/4

x=15

therefore,breadth=15cm and length =15+20=35cm.

Answer 2

Step-by-step explanation:

let the length of rectangle be x+20

breadth is 20-x

perimeter is 100cm

According to question

x+20+20-x+x+20+20-x=100 cm

x+x+x-x+20+20+20+20=100cm

2x+80=100cm

2x=100-80

2x=20

x=20÷2

x=10

so,

x+20=10+20=30cm

20-x=20-10=10cm

therefore,

length=30cm

breadth=10cm

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