Question

the length of a rectangular field is 30 m more than its breath.if the perimeter is640m, find the length of the field​

Answer 1

Step-by-step explanation:

Assumption: Let the breadth of the rectangular field be x m.

Therefore,

Length ( l ) = x + 30 m

Breadth ( b ) = x m

Perimeter = 2 × (l + b) m

=> 640 = 2 × {(x+30) + x}

=> 640 = 2 × (2x + 30)

=> 640 / 2 = 2x + 30

=> 320 = 2x + 30

=> 320 - 30 = 2x

=> 290 / 2 = x

=> 145 = x

Therefore,

breadth = 145m

length = 145 + 30 m

= 175m

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Answer 2

length of a rectangular field=x+30

Breadth of rectangulat field= x

perimeter of rectangle= 640m

=>2(l+b)=640

=>2(x+30+x)=640

=>6x+60=640

=>x=640-60/6

=>x=58