Question

Rectangular piece of wood measures 2cm,4cm and 7 cm with mass of 20 g . Will the piece of wood float on water which has a density of 1g/cm3.

Answer 1

Answer:

The wood will float on water

Explanation:

Length of wood = l = 2cm

Breadth of wood = b = 4cm

Height of wood = h = 7cm

Mass of wood = m = 20g

We know that,

Volume of cuboid = V

$\boxed{V = lbh}$

Putting the given values in we get,

V = lbh

V = 2*4*7

V = 56 cm³

We know that,

Density = ρ

$\boxed{\rho = \frac{M}{V} }$

Putting the values in we get,

ρ = 20/56

ρ = 0.357 g/cm³

Since,

Density of wood < Density of water

0.357 < 1

the wood can float on water