Physics

Problem

A solid cuboid has length

10\,\text{cm}

, breadth

4\,\text{cm}

and height

2\,\text{cm}

. Its weight in air measured by a spring balance is

19.6\,\text{N}

. Taking

g = 9.8\,\text{m}\,\text{s}^{-2}

, calculate the density of the material of the cuboid. a)

2.5\times 10^{3}\,\text{kg}\,\text{m}^{-3}

2.45\times 10^{5}\,\text{kg}\,\text{m}^{-3}

2.5\times 10^{4}\,\text{kg}\,\text{m}^{-3}

1.25\times 10^{4}\,\text{kg}\,\text{m}^{-3}