Question

Find surface area.


Please try to show steps.

Answer 1

78

Explanation:

two of the faces are found from the rectangle of sides 6 and 4:

2 * 6 * 4 = 48

two of the faces are found from the right triangle of legs 3 and 4:

2 * 0.5 * 3 * 4 = 12

finally one face is a rectangle of sides 3 and 6:
3 * 6 = 18

adding up is 48 + 12 + 18 = 78