Question

find the circumference of the circle whose diameter is 9.8cm​

Answer 1

Answer:

Step-by-step explanation:

Circumference = 30.8 cm

Step-by-step explanation:

Answer 2

Answer:

Given:

• Diameter of circle = 9.8cm

Find:

• Circumference of circle

Solution:

${ \boxed{ \rm{Circumference \: of \: circle = 2πr}}}$

• First we have to find radius of circle
• We already know that radius = diameter/2

$: { \implies{ \rm{Radius = \frac{9.8}{2} = 4.9 }}}$

So, radius = 4.9cm

${ \implies{ \rm{Circumference =2 \times \frac{22}{7} \times 4.9 }}} \\ \\ { \implies{ \rm{Circumference =2 \times 22 \times 0.7 }}} \\ \\ : { \implies{ \rm{Circumference =44 \times 0.7 }}} \\ \\ : { \implies{ \rm{Circumference = 30.8}}}$

Therefore,

• Circumference = 30.8 cm