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The radius of a circle is 2.12 metre. It...

The radius of a circle is 2.12 metre. Its area according to the rule of significant figures is

A

`4.5216 cm^(2)`

B

`4.521 cm^(2)`

C

`4.52 cm^(2)`

D

`4.5 cm^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Area of disk
`=piR^(2)=(3.14)(1.2)^(2)=4.5216=4.5cm^(2)`
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