Question

Q. 2. If the circumference of
a circle is 308 cm. Find
its radius and diameter​

Answer 1

Given:- Circumference of circle is 308cm.

To Find:- radius and diameter of circle.

Solution :-

Let the radius of circle be r cm.

⇒Circumference of circle = 308cm

⇒ 2πr = 308cm

⇒ 2 × 22/7 × r = 308cm

⇒ 44/7 × r = 308cm

⇒ r = (308 × 7) / 44

⇒ r = 2156/44

⇒ r = 49cm

Therefore, radius of circle is 49cm.

⇒ Diameter = 2r

= 2×49

= 98cm

Therefore, diameter of circle is 98cm.

Related information:-

• Circumference of circle = 2πr

• Diameter of circle = 2×radius

Answer 2

Answer:

Given :-

• Circumference = 308 cm

To Find :-

Radius and Diameter

Solution :-

As we know that

Circumference = 2πr

308 = 2 × 22/7 × r

308 = 44/7 × r

308 ÷ 44/7 = r

308 × 7/44 = r

2156/44 = r

49 = r

Now,

Diameter = 2(radius)

Diameter = 2(49)

Diameter = 98 cm