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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.
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Solution
(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
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