Question

The length and breath of a rectangle are 8cm and 5cm . Find its perimeter
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Answer 1

Answer:

Perimeter of rectangle =2(l+b)

=2(8+5)cm=26cm

New length =(8+x)cm

New Breadth =(5+x)cm

Given 2(8+x+5+x)=26+2x

⇒2(13+2x)=52⇒13+2x=

2

52

=26

⇒2x=13⇒x=

2

13

=6.5cm

Therefore New Length =(8+6.5)cm =14.5cm

Answer 2

Perimeter of rectangle

= 2 (8+5) cm =26cm

New length =(8+x)cm

New breadth = (5+x)cm

Given2 (8+x+5+x)=26+2x

=2 (13 +2x)=52=13 +2x 52 =26

_

2

= 2x=13 =x=13 =6.5 cm

_

2

Therefore New length = ( 8 + 6.5cm) =14.5cm

Hope it's help you