I need to get volume of few bodies 

I have following things:



I have formula d^2*π*h/4

The problem is I need to take care of significant digits which I don't understand.

Next problem for the same body after that is with density ρ=m/V. I also need to watch out for significant digits.

I have the mass of 414g.

If anyone knows this please answer.

P.S. It would be helpful for me if you write density in g/cm^3 and in kg/m^3.

Guest Nov 18, 2017
edited by Guest  Nov 18, 2017

\(d^2*π*h/4\) = 3,5002 * \(π\) *5505 /4= 15132659.11 considering u need the volume then u should round the answer to 4 s.f which will be around 15130000 mm3 . Now if u want the answer in either cm3 or m3 then just use the basic S.I units to convert the answer. 

Next problem

15130000 mm3 = 15130 cm3

Density = \(\rho=m/V\)

             = \(\rho= 414/15130\)

             = \(\rho= 0.027 gcm^-3 \) or \(27.36 kgm^-3 \)


For the first problem I divided the equation by 4 cuz i dont know if only the h is being divided by 4 or the whole equation.

If only the h is being divided by 4 then all the answers will be changed.



Rauhan  Nov 18, 2017

 Will convert the units from mm to meters.


1 meter =1,000 mm



V = d^2*π*h/4 - This is the volume of a cylinder.

V =3.5^2*3.141592*5.505/4

V =52.964 m^3

Density = Mass/Volume

414g / 1,000 =0.414 kg.

Density =0.414/52.964

Density =0.00782 kg/m^3

Guest Nov 18, 2017
edited by Guest  Nov 18, 2017
edited by Guest  Nov 18, 2017

9 Online Users

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.