the perimeter of a rectangle is 30m length is 9m what is the breadth of the rectangle
please give me answer with explanation
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Answer:
The perimeter of a rectangle is 30 m. The length of the rectangle is 3 m less than twice the width. Find the length and width of the rectangle.
The perimeter of a rectangle is 30 m. The length of the rectangle is 3 m less than twice the width. Find the length and width of the rectangle.
length m
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Judith N. answered • 04/11/20
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Perimeter= 2 (length + width)
let length = l, and, width =w
if the length is 3m less than twice the width, then, l = 2w-3
Perimeter= 2 (l+w)
substitute l with 2w-3
now, perimeter = 2 (2w-3 + w)
= 2 (3w-3)
= 6w-6
we know that the perimeter is 30m
therefore,perimeter : 6w-6 =30m
6w = 36m
w=6m
since l = 2w-3,
l = 2(6) -3
l = 9m
therefore, width = 6m, and length = 9m
width means breadth
hope it will help you
Answer:
6m
Step-by-step explanation:
Perimeter of a rectangle= 2(l+b)
Length= 9m, Perimeter= 30m
30= 2(9+b)
30/2= 9+b
9+b=15
b=15-9
b=6m, which is the required value.