Question

a square lawn has a side 35 m long how much wire will be needed to fence the lawn?find the cost of fencing thre rate of 20 per meter long​

Answer 1

Answer:

₹2,800

Step-by-step explanation:

Step 1 : Find the fencing :

The square lawn is to be fenced all around with a wire. So, we need to find it's perimeter.

Perimeter of the square lawn is given by :

→ 4 × each side

• each side is 34m (given)

So,

→ 4 × 35

→ 140metres.

∴ The required fence is 140metres

Step 2 : Find the cost of fencing :

[unitary method]

∵ if 1 metres of fencing costs ₹20

∴ 140 metres of fencing will cost=20 × 140

= ₹2800

Answer 2

Given:-

• Side of the square lawn = 35 m
• rate of fencing = Rs.20/m

To find:-

• Cost of fencing the entire lawn

Formula to be used:-

• fencing is done around the boundaries of the lawn. Hence, perimeter is required

:$\implies$ $\underline{\boxed{\sf perimeter = 4 × sides}}$

Solution:-

:$\implies$ $\sf perimeter = 4 × 35$

:$\implies$ $\sf perimeter = 140 m$

Now, cost of fencing

:$\implies$ $\sf 20 × 140 = 2800 Rs$

___________________________

More to know:-

• Area of a square:-

:$\implies$ $\underline{\boxed{\sf area = sides²}}$