Question

The length of a rectangle field is thrice of its breath. If the area of the field is 1728m square find the cost of fencing it at 45 ruppes per m
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Answer 1

Answer:

The cost of fencing is Rupees 4000.

Step-by-step explanation:

Let the breadth be x

so,

Length = 3x

Breadth = x

Area = 3x * x

       = 3x²

so,

3x² = 7500

x²   = 2500

x     = √2500

x     = 50

so,

Length   = 3x = 3 * 50 = 150 meters

Breadth = x = 50 meters

Perimeter = 2 (150 + 50)

                = 2 (200)

                = 400 meters

Cost of fencing = Rupees 10/meter

                        = 10 * 400

                        = 4000

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