Question

A piece of wood measures 4 cm by 3 cm by 6cm. If it weighs 108 g, then find the density of the wood in SI units.( show the working) *

Answer 1

➡Dimention of wooden piece is 4×3×6cm.

➡ Volume of wooden piece is

4×3×6 is 72cm³.

➡mass of wooden piece is 108g.

↪↪↪NOW DENSITY IS

$\frac{mass}{volume}$

$\frac{108}{72}$

1.5gcm-³

Answer 2

Weight of wood = 108 g or 0.108 kg

Wood dimensions = 4cm by 3cm by 6cm

We know that density is mass per unit volume.

$density \: = \: \frac{mass}{volume} \\ \\ density \: = \frac{108 \times {10}^{ - 3} }{4 \times {10}^{ - 2} \times 3 \times {10}^{ - 2} \times 6 \times {10}^{ - 2} } \\ \\ density \: = \frac{108 \times {10}^{ - 3} }{72 \times {10}^{ - 6} } \\ \\ density \: = 1.5 \times {10}^{3} kg {m}^{ - 3}$