Question

in length. 5. If the radius of a circle is 7 cm, what would be its circumference or perimeter?​

Answer 1

Given that- Radius of the circle, R=7cm

Perimeter of the circle is =2πR

Put valuesR=7cm, π=

22

7

Perimeter of the circle is =2×

22

7

×7

Simplify the above equation –

$7$Fromthenumeratorandthedenominatorcancelseachother

Perimeter of the circle is =2×22

=44cm

The perimeter of a circle with radius is 7 cm is 44 cm.

Therefore, the required solution is - Perimeter of the circle is =2πR

Perimeter of the circle is =2π×7

=14π

Hence the perimeter of the circle is =14π

Therefore, from the given multiple choices, option B is the correct answer.