help fast please

Question

What is the total surface area of a right rectangular prism with a base of 2 cm by 3 cm and a height of 6 cm?
A) 13 cm2.
B) 72 cm2.
C) 113 cm2.
D) 226 cm2.

 

The L=2      w=3      h=6

Answer 1

A rectangular prism's surface area is the 2 ends plus 4 sides (2 different sizes in this case). Find the area of each, then add together. The end, 2x3, has an area of 6. 2x6 and 3x6 gives you the sides. end + end + side(a) + side(a) + side(b) + side(b) = 6+6+12+12+18+18 = 72.

Answer 2

It's a box. There are three pairs of congruent rectangular surfaces.

 

If you make a sketch and label its L, W & H values as given, you will be able to visualize it and to calculate each of the three different areas, and thus soon get the correct answer.