What is the total surface area in square meters of a rectangular solid whose length is 5 meters, width is 4 meters, and depth is 1 meters?  Choices: A) 48 m 2 B) 40 m 2 C) 50 m 2 D) 58 m 2 E) 62 m 2

Rationale: "surface area of a cuboid = 2 ( lb + bh + lh ) = 2 ( 5 * 4 + 4 * 1 + 5 * 1 ) = 2 ( 20 + 4 + 5 ) = 2 * 29 = 58 m 2 answer : d"
Answer: D