Question

Find the total surface area in square kilometers, of the 3-dimensional

figure shown below.
Enter only a number as your answer.

Answer 1

`\displaystyle\bf\\\textbf{We have a prism with a rectangular triangle base.}\\\\Base~area\!:~~Ab=(3*4)/(2)=(12)/(2)=6~km^2\\\\Lateral~area\!:~~Al=(3+4+5)*9=12*9=108~km^2\\Total~area\!:~~At=2* Ab+Al=2* 6+108=12+108=\boxed{\bf120~km^2}\\`

Answer 2

Answer: 120 km^2
Step-by-step explanation:
S = (9x3) + (9x4) + (4x3)2/2 + (9x5)
S= 27 + 36 + 12 + 45
S = 120