Question

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Q) Find the length and breadth of the rectangle given above if it's perimeter is 72m?​

Answer 1

Answer:

perimeter of rectangle is 2 (length+breadth)

2( 5x+4+x-4) = 72

2( 6x)=72

6x= 36

x=6

length= 5x+4= 5×6+4=34

breadth= x-4=6-4=2.

Answer 2

Step-by-step explanation:

length = 5x+4

breadth = x-4

perimeter = 72m

perimeter of rectangle = 2(l+b)

72m = 2(5x+4+x-4)

72m = 10x+8+2x-8

+8 and -8 were cancelled

72m = 10x+2x

72m = 12x

x = 72

12

x = 6

Area of rectangle = l×b

= 5x+4×x-4

= 5(6)+4×(6)-4

= 30+4×6-4

= 34×2

= 68

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