Answer:
94 cm²
Step-by-step explanation:
The current length is 5 cm; double that is 10 cm;
The current width is 4 cm; double that is 8 cm; and
The current height is 3 cm; double that is 6 cm.
The enlarged prism still has 6 sides:
Ends are (4 cm · 3 cm) each, and there are two of these, so the total area of the ends is 24 cm².
Sides are (5 cm · 3 cm) each, and there are two: 30 cm².
Top and bottom are (5 cm · 4 cm) each, and there are two: 40 cm²
Thus, the total surface area of the enlarged prism is:
(24 + 30 + 40) cm², or 94 cm²
