Question

find the diameter of a circle whose circumference is 5.5km​

Answer 1

Answer:

1.75km

Step-by-step explanation:

2pi r =5.5

2 x 22/7 x r= 5.5

44r= 5.5 x 7

r= 5.5 x 7/ 44

38.5/44

0.875

so,

r=0.875

diameter= 2r

              =2(0.875)

              = 1.75km

Answer 2

GivEn:

• Circumference of circle = 5.5 km

To find:

• Diameter of circle?

Solution:

☯ Let radius of circle be r cm.

We know that,

★ Diameter of Circle = C/2π

Now, Putting value,

⇒ 5.5/π

⇒ 5.5 × 22/7

⇒ 38.5/22 ÷ 2

⇒ 1.75 ÷ 2

⇒ 0.875 km

Thus, Radius of circle is 0.875 km.

We know that,

• Diameter of circle = 2 × Radius

∴ Hence, Diameter of circle is 1.75 km.

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★ More to know:

• Circumference of Circle = 2πr

• Area of sector = θ/360 × πr²

• Length of an arc = θ/360 × 2πr