Question

Find the cost of fencing a rectangular park of length 120 m and breadth 80 m at the
rate of ₹ 25 per metre.

Answer 1

QUESTION

Find the cost of fencing a rectangular park of length 120 m and breadth 80 m at the  rate of ₹ 25 per metre.

EXPLANATION

We know that fencing is done on the boundary i.e. We gonna be finding perimeter of the park

The park is in the same of Rectangle and perimeter of rectangle is given by-

$\longrightarrow \underline{\boxed {\ddag \; \tt Rectangle_{(perimeter)}=2(l+b) }}$

Here,

l=Length = 120 m

b=Breadth = 80 m

Now finding perimeter -:

$\longrightarrow{\\ \bf Rectangle_{(perimeter)}=2(120+80) }}\\\\\longrightarrow{\\ \bf Rectangle_{(perimeter)}=2(200) }}\\\\\longrightarrow\boxed{{\\ \bf Rectangle_{(perimeter)}=400\;m }}$

Now cost of fencing will be-:

$\longrightarrow \underline{\boxed{\dag\;\tt\; Total\\\;cost=Perimeter \times cost }}$

Now finding cost

$\longrightarrow \;\bf\;Total\; Cost=Perimeter \times cost }}\\\\\longrightarrow \;\bf\;Total\; Cost=400 \times 25 }}\\\\\longrightarrow \boxed{\bf\;Total\; Cost=10000\; rs}}}$

∴Cost of fencing is ₹1000

Answer 2

We know that fencing is done on the boundary i.e. We gonna be finding perimeter of the park

The park is in the same of Rectangle and perimeter of rectangle is given by-

Here,

l=Length = 120 m

b=Breadth = 80 m

Now finding perimeter -:

Now cost of fencing will be-:

Now finding cost

∴Cost of fencing is ₹1000