Question

PLS HELP... NEED ANSWER ASAP AS I HAVE A TEST NEXT WEEK!!

Q: the total surface area of this cuboid is 112cm squared...

find the value of x

(there's a picture below)

Answer 1

x = 3 cm.

Explanation:

The surface consists of 3 pairs rectangles of equal area. so we have the equation:

2* 2x + 2* 10x + 2 * 2*10 = 112

4x + 20x + 40 = 112

24x = 72

x = 72/24

x = 3 cm.