Question

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Answer 1

Step-by-step explanation:

Let the breadth be x

A.T.Q

perimeter of rectangle = 2(l+b)

2(3+x)=20

6+2x=20

2x=20-6

2x=4

x=4/2

x=2

hence the breadth = 2

Answer 2

Answer:

7 cm

Step-by-step explanation:

Perimeter of a Rectangle = 2(l+b)

20 cm = 2(3+b)

20cm = 6+2b

20-6 = 2b

14=2b

14/2=b

7=b

Therefore , the other side ( breadth ) is 7cm

CHECK

2(7+3)

14+6=20cm

Hence checked and proved.

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