Question

Q 31 The sum of the weights of an iron piece and of a copper piece is 1280 gm. The volume of the copper piece is twice that of the
iron piece. If the weight of 1 cubic centimeter of iron is 7.8 gm and that of copper is 8.9 gm. Find the volume of each piece
.

Answer 1

c = 2 i

7.8 i + 8.9 c = 1280

substituting ... 7.8 i + 8.9 (2i) = 1280

solve for i , then substitute back to find c

Answer 2

where is the solution

Answer 3

Hello don't lie you didn't even solve.
Where is the solution?
I can't find it.