Question

The area of a rectangular garden of length 40 m, is 1000 sqm. Find the breadth of the garden and its perimeter. The garden is to be enclosed by 3 rounds of fencing, leaving an entrance of 4 m. Find the cost of fencing the garden at a rate of 250 rupees per metre.

Answer 1

Length of the garden = 40 m

Area = 1000 sq m

⇒ lb = 1000

⇒ 40b = 1000

⇒ b = 25 m

Perimeter = 2 (l + b)

= 2 (40 + 25) 

= 130 m

For 1 round of fencing leaving the entrance of 4 m, the length of wire required is 130 m − 4 m

= 126 m

For 3 such rounds of fencing, 3 × 126 m

= 378 m of wire required.

Rate of fencing 1 m = Rs 250

Rate of fencing 378 m = 378 × 250

= Rs 94500

Thus, Rs 94500 is required for fencing the garden.