Question

How long wire will be required to fence a circular garden of radius 70m with 4 layers?

1️⃣ 440 m
2️⃣ 880 m
3️⃣ 1760 m
4️⃣ 1320 m

Answer 1

Answer:

1760 m

Step-by-step explanation:

for 1 layer of fence we have to find the radius of the garden which is 2 pi r

= 2 x 22/7 x 70

= 440m

so fence required for 4 layers will be

440 x 4

= 1760 m

Answer 2

Answer:

• 1760 m

Step-by-step explanation:

Given

• Radius of circular garden = 70 m
• Number of layers = 4

To find

• Length of wire required to fence the circular garden.

Solution

⇛ Fence is nothing but the perimeter and for circle its called circumference.

⇛ Circumference of circle = 2πr

• 2 × 22/7 × 70
• 44/7 × 70
• 440

∴ For 1 layer the length is 440 m

⇛ Now,

• 4 layers
• 4 × 440
• 1760

∴ For 4 layers the length of long wire is required is 1760 m.