Respuesta :

Take into account that the lateral faces are 3, and sum the area of such faces.

The area of the rectagular face is:

A1 = (6 in)(10 in) = 60 in²

The area of the other two rectagles is:

A2 = (8 in)(10 in) = 80 in²

A3 = (10 in)(10 in) = 100 in²

Then, the total surface area is:

AT = A1 + A2 + A3

AT = 60 in² + 80 in² + 100 in²

AT = 240 in²