Given,
The mass of the classmate, M=65 kg
The weight of the table, W=490 N
The weight is the force acting on an object due to gravity.
And it is given by,
[tex]W=mg[/tex]Where m is the mass of the table and g is the acceleration due to gravity.
On substituting the known values,
[tex]\begin{gathered} 490=m\times9.8\text{ } \\ m=\frac{490}{9.8} \\ =50\text{ kg} \end{gathered}[/tex]The mass of the table is 50 kg
