Question

6. Find the cost of fencing a rectangular park 300 m long and 200 m wide at the rate of ₹4 per metre.
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Answer 1

Answer: Rs 4000 is cost of fencing

Given :

l=300m ;b=200;rate of fencing per meter=Rs 4

To find :

Cost of fencing?

Solution :

Perimeter =2(l+b) =2(300+200)=1000m

Cost of fencing for 1 m =Rs 4

Hence, for 1000m =1000×4=Rs 4000

Answer 2

Given:

Dimensions of a rectangular park, where

Length = 300m and

Width = 200m

To find:

The cost of fencing the rectangular park at the rate of ₹4 per metre.

Solution:

Fencing will be done only on the border of an area.

Therefore, we should find the perimeter of the rectangular park.

Step 1:

Perimeter = 2 × ( l + b )

                = 2 × ( 300m + 200m )

                = 2 × 500m

                = 1000m

Step 2:

The cost of fencing the rectangular park for 1 metre is ₹4.

Therefore, the cost of fencing the rectangular park for 1000 metres will be,

                  = 1000m × ₹4

                  = ₹4000

Final Answer:

The cost of fencing a rectangular park 300 m long and 200 m wide at the rate of ₹4 per metre is ₹4000.