ni) pentagon
3. The cost of cultivating a rectangular field at the rate of rupees 3 per square metre is rupees 1728. If the breadth of it
eld is 18 metre find the cost of fencing the field at rupees 9.5 per metre.
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Rate of Cultivating Rectangular field = ₹3 x Area of Rectangular Field
Here it is given that rate of cultivating field is ₹1728
∴ 3 x Area Of Rectangular Field = 1728
Area of Rectangular field = 1728/3=576 m^2
We know that,
Breadth of the field = 18m
Area of the field = L x B
576 = L x 18
L = 576/18
L = 32m
So we found that he length is 32m.
Perimeter of Rectangle = 2(l+b)
= 2(32+18)
= 2 x 50
= 100m
Cost of Fencing = ₹8.5 x Perimeter
= ₹8.5 x 100
= ₹850
∴The cost fencing is ₹850.
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