Question

The radius of a thin wire is 0.16 mm . The area of cross section of the wire in mm with correct number of significant figures​

Answer 1

Answer:

0.080425$mm^{2}$ just applied to the area=π$r^{2}$

Explanation:

Answer 2

The area of cross section of the wire is $0.08\ mm^2$.

Explanation:

It is given that,

The radius of a thin wire is 0.16 mm.

To find,

The area of cross section of the wire.

Solution,

The cross section is in the form of circle whose area is given by :

$A=\pi r^2$

Where $\pi=\dfrac{22}{7}=3.14$

$A=\pi (0.16\ mm)^2$

$A=0.0804\ mm^2$

In significant figures,

$A=0.08\ mm^2$

So, the area of cross section of the wire is $0.08\ mm^2$.

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