Multiple choice

An iron cylinder of radius $1.4 \ cm$ and length $8 \ cm$ is found to weigh $369.6 \ g$. Calculate the density of iron.

  1. $7500\ kg/m^3$
  2. $7500 \ g/cm^3$
  3. $7500  \ kg/cm^3$
  4. None of the above

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Volume = pi * r^2 * h = (22/7) * 1.4 * 1.4 * 8 = 49.28 cm^3. Density = Mass / Volume = 369.6 / 49.28 = 7.5 g/cm^3. Converting to kg/m^3: 7.5 * 1000 = 7500 kg/m^3.