Question

the length and breadth of a rectangular field are in the ratio 4:3 if the area of the field is 4800 metre square then find the cost of fencing it as rupees 50 per metre
step by step explanation
Let,the lenght of the recta

Answer 1

Answer:

₹14000

Explanation:

Let the length of the rectangle be 4x

Let the breadth of the rectangle be 3x

Area of the field = 4800 m²

l×b=4800 m²

4x × 3x = 4800 m²

12x²=4800 m²

x²= $\frac{4800}{12}$

x²= 400

x= √400

x=20

∴Length=4×20=80m

∴Breadth=3×20=60m

⇒The cost of fencing = ₹50 per metre

  [We need to find the perimetre]

= 2[80+60]

=2[140]

=280m

∴cost of fencing = 280×50

⇒₹14000