A video surveillance room has 8 identical rectangular monitors. The sum of the perimeters of the 8 monitors is 720 inches. If the width of each monitor is 27 inches, how many inches high is each monitor
All the monitors are identical, so we can start by using the formula for the perimeter. 2(L+27). 2L+54. This is for one monitor. We have to multiply this by 8. 16L+432=720. 16L=288. L=18
