Question

the perimeter of a rectangle is 72 cm the length is 3 times the width . find the area of rectangle​​

Answer 1

Answer:

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The area of the rectangle is 243cm.

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Step-by-step explanation:

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Let the width be x  

Length is 3x

Perimeter of rectangle = 2 ( l + b )

72 = 2 ( x + 3x )

72 = 2 × 4x

36 = 4x

9 = x

So length is 3 × 9 = 27

Area of rectangle = l × b = 9 × 27 = 243cm

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Answer 2

Step-by-step explanation:

length=3x

width=x

perimeter=72m

2(l+b)=72

2(3x+1x)=72

2(4x)=72

8x=72

x=72/8

x=9

width=9m

length=3×9=27m

area=l×b

length=27m

width=9m

area=27×9

=243m²