Question

The perimeter of a rectangular field is 500 m and its length = 150 m. Find:
(i) its breadth,
(ii) its area.
(iii) cost of ploughing the field at the rate of ₹1.20 per square meter.

Answer 1

(i) Perimeter of a rectangle = 2 x (length + breadth)

⇒ 500 m = 2 x (150 m + breadth)

⇒ 250 m – 150 m = breadth

∴ breadth = 100 m

(ii) Area of rectangular field = length x breadth

= 150 m x 100 m

= 15000 m²

(iii) Cost of ploughing the field at the rate of

= ₹ 1.20 per square m²= area of the field x rate of ploughing

= 15000 m² x ₹ 1.20 per square metre

= ₹ 15000 x 1.20 = ₹ 18000