Question

area of a circle is 154 cm2,find it's circumference ​

Answer 1

Answer:

Circumference=43.99 cm

Answer 2

→Question: Area of a circle is 154cm² , find it's circumference.

↔Solution:

⇒Given: Area of circle = 154cm²

⇒To find: Circumference of the circle = ?

⇒We know, area of circle = πr²

⇒ ²²⁄₇ × r² = 154

⇒r² =154 × ⁷⁄₂₂

⇒r² = 49

⇒r=√49

⇒∴r= 7cm

Now, circumference of circle =2πr

⇒2 × ²²⁄₇ × r

⇒2 ײ²⁄₇ ×7

⇒⁴⁴⁄₇ ×7

⇒44cm

∴If area of a circle is 154cm² , then it's radius will be 7cm and the circumference will be 44cm.