Question

find the cost of fencing a rectangular piece of land measuring 0.7 km by 0.5 km at the rate of 50 rupees per metre each side is to be fenced with four rows of wires​

Answer 1

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Sides of rectangular field = 0.7 km and 0.5 km

Perimeter of rectangle = 2(l + b)

Perimeter of rectangle = 2(l + b)

= 2( 0.7 + 0.5)

= 2 × 1.2

= 2.4 km

Cost of fencing per metre = Rs 50

Each side is to be fenced with four rows of wires.

Length of the wire to be fenced = 4 × Perimeter

= 4 × 2.4

= 9.6 km

Cost of fencing = 50 × 9.6

= Rs 480

Answer 2

Answer:

₹4,80,000

Step-by-step explanation:

Length of the rectangular piece of land = 0.7 Km = 700 metres

Breadth of the rectangular piece of land = 0.5 Km - 500 metres

Length of wire required to fence the piece of land = Perimeter x 4

                                                               = [(Length+Breadth)x2]x4

                                                               =[(700m+500m)x2]x4

                                                               =[1200mx2]x4

                                                               =2400mx4

                                                               =9600m

Cost of fencing the rectangular piece of land = ₹50 x 9600m

                                                                            = ₹4,80,000