The Weight of a Piece of Sheet Metal with Given $2.5 \mathrm{~m} \times 3.4 \mathrm{~m}$

The weight of a piece of sheet metal with given thickness is proportional to its area. If a sheet of copper with dimensions $2.5 \mathrm{~m} \times 3.4 \mathrm{~m}$ weighs $45 \mathrm{~kg}$ , what is the weight of a sheet of copper with the same thickness, length $5 \mathrm{~m}$ , and width $1.7 \mathrm{~m}$ ?