Question

18 The perimeter of a rectangular park is 420m. If its length is 84 m, find its breadth.
1 point
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Answer 1

Step-by-step explanation:

perimeter of rectangle=2(l+b)

420=2(84+b)

420=168+2b

420-168=2b

252=2b

b=252/2

b=126

Answer 2

Answer:

126 m is the breath

Step-by-step explanation:

Given

• The given shape is a rectangle
• The perimeter of the park is 420m
• The length of the park is 84 m

To Find

• The breadth of the park.

Solution

Perimeter of a rectangle = 2( length + breath )

⟹ 420 m = 2( 84 m + breath )

⟹ 420 m/2 = 84 m + breath

⟹ 210 m = 84 m + breath

⟹ 210 m - 84 m = breath

⟹ 126 m = breath

Double check:

Perimeter = 2( length + breath )

⟹ 420 m = 2( 84m + 126m)

⟹ 420 m = 2( 210m )

⟹ 420 m = 420m

LHS = RHS