Question

the diameter of a circular disc is 5 cm find its area assuming Pi is equal to 3.14 ​

Answer 1

Answer: 19.625$cm^{2}$

Step-by-step explanation:

Radius of the  circular disc is 5/2 cm = 2.5 cm

Area of a circle = $\pi r^{2}$ = 3.14 x 2.5 x 2.5= 19.625$cm^{2}$

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Answer 2

Answer:

15.7 cm

Step-by-step explanation:

Given:

Diameter of circular disc (d) = 5cm

To find:

Area of circular disc

Solution:

Radius of circular disc (r) = d/2

= 5/2

= 2.5 cm

Area of circular disc = 2πr

= 2×3.14×2.5

= 15.7 sq cm

OR

Solution:

Area of circular disc = πd

= 3.14×5

= 15.7 sq. cm

Ans. The area of the circular disc having diameter

5 cm is 15.7 sq. cm or 15.7 cm².