Question

find the length of a rectangular playground having perimeter 600 m and breath 90 m

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Answer 1

$\sf{Answer}$

Given :-

• Perimeter of rectangle is 600m
• Breadth of rectangle = 90m

To find :-

Length of rectangle

Formula to know

Perimeter of rectangle = 2(l+b)

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Solution:-

Let breadth of rectangle = b

By above formula We can do

Perimeter of rectangle = 2(l+b)

But according to formula perimeter = 600m

So,

600m = 2 (l + b)

600m = 2 ( 90m + b)

600m = 180m + 2b

Transpose 180m to RHS

600m - 180m = 2b

420 m = 2b

b = 420m/2

b = 210m

So, breadth of rectangle is 210m

Know more formulaes :-

• Perimeter of square = 4a
• Perimeter of rhombus = 4a
• Perimeter of equilateral triangle = 3a
• Perimeter of Scalene triangle = a+ b+c
• Perimeter of Isosceles triangle = 2a+b

Answer 2

perimeter of rectangle = 2(l+b) so,

600= 180-2b
420= 2b
B = 210