If the circumference is 22cm, then radius of the circle is A) 1cm B)

1.	If the circumference is 22cm, then radius of the circle is A) 1cm B) 0.5cmC) 3.5 cm D) 14cm
Answer» Correct option is C) 3.5 cm Let radius of the circle is r cm. Circumference of circle is P = 22cm(given) ⇒ 2\(\pi r\) = 22 ⇒ 2 x 22/7 x r = 22 ⇒ r = 22 x 7/22 x 1/2 = 7/2 = 3.5 cm Hence, radius of the circle is r = 3.5 cm

If the circumference is 22cm, then radius of the circle is A) 1cm B) 0.5cmC) 3.5 cm D) 14cm

Answer»

Correct option is C) 3.5 cm

Let radius of the circle is r cm.

Circumference of circle is P = 22cm(given)

⇒ 2\(\pi r\) = 22

⇒ 2 x 22/7 x r = 22

⇒ r = 22 x 7/22 x 1/2 = 7/2 = 3.5 cm

Hence, radius of the circle is r = 3.5 cm