Question

Find the circumference of 9.1cm​

Answer 1

Answer:

Since, Diameter =R*2

i. e. Radius=Diameter/2

=9.1/2=45.5cm

Hence, Circumference =2πr

=2*22/7*45.5

=2*22/7*455/10

=22*91/7

=22*13

= 286cm

Step-by-step explanation:

hope it helps dear.

Answer 2

Answer:

Question :-

• Find the circumference of the circle whose diameter is 9.1 cm

Given :-

• A circle whose diameter are is 9.1 cm.

To Find :-

• What is the circumference of the circles.

Formula Used :-

$\clubsuit$ Circumference of Circle Formula :

$\bigstar \: \: \sf\boxed{\bold{\pink{Circumference_{(Circle)} =\: 2{\pi}r}}}\: \: \: \bigstar$

where,

• π = Pie or 22/7
• r = Radius

Solution :-

First, we have to find the radius :

Given :

• Diameter = 9.1 cm

According to the question by using the formula we get,

$\implies \bf Radius =\: \dfrac{Diameter}{2}$

$\implies \sf Radius =\: \dfrac{9.1}{2}$

$\implies \sf\bold{\purple{Radius =\: 4.55\: cm}}$

Now, we have to find circumference of the circle :

Given :

• Radius = 4.55 cm

According to the question by using the formula we get,

$\implies \bf Circumference_{(Circle)} =\: 2{\pi}r$

$\implies \sf Circumference_{(Circle)} =\: 2 \times \dfrac{22}{7} \times 4.55$

$\implies \sf Circumference_{(Circle)} =\: \dfrac{44}{7} \times 4.55$

$\implies \sf Circumference_{(Circle)} =\: \dfrac{200.2}{7}$

$\implies \sf\bold{\red{Circumference_{(Circle)} =\: 28.6\: cm}}$

$\therefore$ The circumference of the circle is 28.6 cm .

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