Question

find the radius of the circle whose circumference is 11.0 km​

Answer 1

Answer:

Radius=1.75km.

Step-by-step explanation:

Circumference of the circle=11km=(11×1000)m =11000m.

Let the radius of the circle be r m.

Then, 2πr=11000

=>2× 22/7 ×r=11000

=>44/7 ×r=11000

=>r=11000× 7/44

=>r=250×7

=>r=1750.

Therefore, r=1750m

=1.75km.

Hence, radius of the circle is 1.75km.

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Answer 2

$Radius(r) = \frac{7}{4} \: km= 1.75 \: km$

Step-by-step explanation:

Given:-

• Circumfrence of circle= 11 km

To Find:-

• Find the Radius ?

$\huge{{{ \color{magenta}{ \mathfrak{ ★solution :}}}}}$

$Circumfrence \: of \: circle= 11 km \\ \\ = = > \: \: \: 2\pi \: r = 11 \\ \\ = = > \: \: \: 2 \times \frac{22}{7} \times r = 11 \\ \\ = = > \: \: \: radius(r) = \frac{11 \times 7}{2 \times 22} \\ \\ = = > \: \: \: radius(r) = \frac{7}{4} \: km=1.75\: km$

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