Is the statement "$A$ particle has point volume" true or false?

Which of the points is the likely position of the centre of mass of the system shown in the figure?

Two particles of mass $5\, kg$ and $10\, kg$ respectively are attached to the two ends of a rigid rod of length $1\, m$ with negligible mass. The centre of mass of the system from the $5\, kg$ particle is nearly at a distance of $..........\, cm$.

$A$ uniform rod of length $L$ is placed along the $x$-axis with one end at the origin. If the linear mass density of the rod varies as $\lambda(x) = ax$,where $a$ is a constant,find the position of the centre of mass of the rod.

Where will the centre of mass be located when combining two masses $m$ and $M$ $(M > m)$?

The centre of mass of a triangle shown in the figure has coordinates