The breadth of rectangular field is two-thirds of its length. If its area is 864 m2, then find the cost of fencing it all around at ₹15/m.
Answer & explanation
Correct answer: option 2
We know that,
Area of rectangle = Length × Breadth
perimeter of rectangle = 2 × (Length + breadth)
Let the length = 3m and
the breadth = 2m
According to the question
Area of rectangle = 864
3m × 2m = 864
= 6m2 = 864
= m2 = 144
= m = 12
Length = 3m = 36 m
Breadth = 2m = 24 m
Perimeter of the rectangle = 2 × 60 = 120 m
Total cost of fencing = 120 × 15 = 1800 rupees