1.

The perimeter of a square plot = 360 m. Find :(i) its area.(ii) cost of fencing its boundary at the rate of Rs 40 per meter.(iii) cost of leveling the plot at Rs 60 per square meter.

Answer»

Given, perimeter of square plot = 360 m

∵ Perimeter of the square = 4 x its side

∴ 4 x side of square = 360 m

⇒ side of the square = (360/4) m = 90 m

(i) The area of the square field = (side)²

= (90 m)²

= 90 m x 90 m

= 8100 m²

(ii) Cost of fencing at Rs 40 per metre

= 8100 m2 x Rs 40 per metre

= Rs 324000

(iii) Cost of levelling at Rs 60 per m²

= 8100 m² x Rs 60 per m²

= Rs 486000



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