Question

4. A gardener wants to fence a circular garden of diameter 21m. Find the length of the rope he needs to purchase, if he makes 2 rounds of fence. Also find the cost of the
rope,ifitcosts`4permeter.(Takeπ= 22) 7

Answer 1

Question :

$\longrightarrow$ A gardener wants to fence a garden of diameter 21m . Find the length of the rope he needs to purchase , if he makes 2 rounds of fence . Also find the cost of the rope , if it costs 4 ₹ per meter . ( take $\large\pi$ )

Answer :

Given :-

$\longrightarrow$ Diameter = 21m .

$\longrightarrow$ He makes 2 round of fence.

$\longrightarrow$ Rope costs ₹4 per meter .

To Find :-

$\longrightarrow$ Length of the rope needs to purchase .

$\longrightarrow$ Cost of the rope .

Solution :-

$\longrightarrow$ Perimeter of circle = $\large\boxed{\underline{\bold{2{\pi}r}}}$

[ Value of $\large\pi$ = $\large{\frac{22}{7}}$ ]

• After substituting values :

Perimeter of circle = 2 × $\large\frac{22}{7}$ × 10.5

: $\implies$ 2 × $\large\frac{22}{7}$ × $\large\cancel{10.5}$

: $\implies$ 22 × 3

: $\implies$ $\large\mathtt{\underline{\color{goldenrod}{Perimeter = 66}}}$

• Length of Rope required after 2 rounds :

: $\implies$ 66 × 2

: $\implies$ $\large\mathtt{\underline{\red{Lenght\:of\:Rope\: required\:=\:132m}}}$

• Cost of 134 m rope by 4₹ / m :

:$\implies$ 134 × 4

:$\implies$ 536

$\large\mathtt{\underline{\red{Cost\:of\:Rope\:=536₹}}}$

$\:$

Answer 2

Answer:

Rs.536 is ur answer hope it goes well