Question

9. The area of a circular plate is 77.5 cm', what is diameter of the plate?
(a) 5 cm (b) 6 cm (e) 7 em.​

Answer 1

Answer:

I think option b

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Answer 2

Diameter of the circular plate will be 9.936 cm

So none of the bellow option is correct

Step-by-step explanation:

We have given area of circular plate $A=77.5cm^2$

We have to find the diameter of the plate

Area of circular plate is equal to $A=\pi r^2$, here $\pi$ is constant and r is radius of plate

So $77.5=3.14\times r^2$

$r^2=24.681$

r = 4.968 cm

So radius of the circular plate will be 4.968 cm

Diameter of circle is equal to two times of the radius of circle

So diameter of the circular plate will be equal to 2×4.968 = 9.936 cm

So none of the above option is correct

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