A triangular lamina made of aluminium is of the shape of an equilateral triangle of edge a = 10cm and surface mass density 500 g//m^(2). It is heated from 20°C to 50°C slowly. Determine the increase in its moment of inertia about any of its side. Coefficient of linear expansion of aluminium is 22.9 xx 10^(-6)//^(@) C.

A triangular lamina made of aluminium is of the shape of an equilatera

1.	A triangular lamina made of aluminium is of the shape of an equilateral triangle of edge a = 10cm and surface mass density 500 g//m^(2). It is heated from 20°C to 50°C slowly. Determine the increase in its moment of inertia about any of its side. Coefficient of linear expansion of aluminium is 22.9 xx 10^(-6)//^(@) C.
Answer» Answer :`3.72 XX 10^(-2) GM- cm^(2)`