Answer:
the
of piece a weight is 20g.
Explanation:
Let x be the fraction of weight for 20g..
and m be the weight of piece.
Given:
Two third piece a weights is
.
That means





So, the weight of the piece is 22.5g.
Find what fraction for 20g
fraction of weight

Put weight of piece in above equation.
fraction of weight

fraction of weight

fraction of weight

Therefore, the
of piece a weight is 20g.