Home
Class 11
PHYSICS
If a circular piece of tin has a measure...

If a circular piece of tin has a measured radius of 2.6 cm . What is circumference ?

Text Solution

Verified by Experts

`r=2.6cm`
Circumference of circular dise = `2pir=2xx3.1428xx2.6`
Here `2.6`has onley 2 significant digits. Hence in the above multiplication `pi` value should be written with `2+1=3` significant figures.
`pi=3.1428=3.14`
Circumference `=2xx3.14xx2.6=16.328`
This is to be rounded off to 2 significant digits.
the result is 16.
Promotional Banner

Similar Questions

Explore conceptually related problems

For a Circle if radius = 10.5cm, then it's Circumference = …… .

In measuring the circumference of a circle , there is an error of 0.05 cm. If with this error the circumference of the circle is measured in c cm, then the error in area is

In measuring the circumference of a circle, there is an error of 0.05 cm. If with this error the circumference of the circle is measured as C cm, then the error in area is

A Circle has radius(r) = 35cm then it's Circumference = ……..

For A Circle if Radius = 4.2cm, then it's Circumference = ………