Answer: Surface Area = 2 x (5x2 + 3x2 + 5x3) = 62 centimeters
Surface area of a right rectangular prism = 2(lh + wh + lw)
Step 1: Label the Given-
Length (l) = 5cm, Width (w) = 3cm, Height (h) = 2cm
Step 2: Replace the given-
Surface Area = 2 x (5x2 + 3x2 + 5x3)
= 2 x (31)
Surface Area = 62 centimeters
Horus got his answer, by applying only what lays inside the parentheses. To get the right answer, Horus must multiply what they got by 2:
2 x (31) = 62 centimeters