adityakak1986 adityakak1986
  • 11-01-2020
  • Mathematics
contestada

the cost of fencing of a rectangular field at rupees 30 per metre is rupees 2400 if the length of the field is 24 metre than its breadth ​

Respuesta :

MinYoona
MinYoona MinYoona
  • 11-01-2020

Answer:  

breadth = 8, length = 32

Step-by-step explanation:

perimeter = 2 x (length x breadth)

               = 2 x ((24 + b) + b))

               = 2 x (24 + 2b)

               = 48 + 4 b

48 + 4b meters costs rupees 2400  

each meter costs rupees 30

so,

30 x (48 + 4b) = 2400

1440 + 120b    = 2400

          120b    = 960

                b    = 8

the breadth is 8m, the length is 8 + 24 = 32m

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