The mass of the sandwich is 35 g.
Mass is the amount of matter contained in a body.
Total mass of a composite body such as a sandwich with, bread, jelly and peanut butter, is the sum of the masses of bread, jelly and peanut butter.
[tex] M= m_b +m_j+m_p=(5 g)+(10 g)+(20g)=35 g [/tex]
The mass of the sandwich is 35 g
