Question

the length of a rectangular field is twice its breadth and its area is 2 hectares. find the cost of fencing the field at rupees 50 per metre.

Answer 1

So the perimeter of the field is 3000/5 = 600 m.

The sum of adjacent sides = 600/2 = 300 m.

Length, L = 2x breadth, or 2B

B+2B = 3B = 300 m, or

B = 100 m and L = 200 m.

Check: (100+200)*2*5 = 300*2*5 = 3000 m = 3 km. Correct.

Length, L = 30000 m.