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The length of a rectangle is 3 more than its width. If its perimeter is 42 m. Find its length & breadth and area.​

Sagot :

blackshades

Answer:
Width = 9 m
Length = 12 m
Area = 108 m²


Step-by-step explanation:
Let, width = x
Length = x + 3
Perimeter = 42 m

Perimeter = 2 (l + w)
42 = 2 (x + 3 + x)
42/2 = 2x + 3
21 - 3 = 2x
18 = 2x
18/2 = x
9 m = x (width)

Length = x + 3 = 9 + 3 = 12 m

Area

= l × w

= 12 × 9

= 108 m²

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