Question

find the circumference and area of the circle if radius is 7 cm​

Answer 1

Answer:

44cm, 154cm²

Step-by-step explanation:

circumference of the circle = 2πr

⇒ 2× $\frac{22}{7}$× 7

⇒ 44cm

area of the circle = πr²

⇒ $\frac{22}{7}$ × 7 × 7

⇒ 154cm²

Answer 2

Answer:

The circumference of a circle is $44$ cm.

​    The area of a circle is $154$ $cm^{2}$.

Step-by-step explanation:

• In context to question asked,
• We have to find the circumference and area of the circle if radius is $7$ cm.
• We have a formula for circumference of a circle,

   Circumference of a circle = $2\pi r$

                                        = $2*\frac{22}{7} *7$

                                        = $2*22$

                                        = $44$ cm

• Now, the formula for area of a circle is given by,

     Area of a circle = $\pi r^{2}$

                            = $\frac{22}{7} *7^{2}$

                            = $22*7$

                            = $154$ $cm^{2}$

• ∴ The circumference of a circle is $44$ cm.

​          The area of a circle is $154$ $cm^{2}$.