How many 7-inch high servers can be installed in a 42U rack?

To determine how many 7-inch high servers can fit into a 42U rack, it’s important to understand what a rack unit (U) represents. One rack unit is equivalent to 1.75 inches in height. Therefore, a 42U rack has a total height of 42 multiplied by 1.75 inches, which equals 73.5 inches.

Next, to figure out how many 7-inch servers can fit into this space, you divide the total available height of the rack by the height of each server:

73.5 inches (total height of the rack) divided by 7 inches (height of each server).

Calculating that gives you approximately 10.5. Since you cannot have a fraction of a server installed in a rack, you would round down to the nearest whole number, resulting in 10 servers fitting into the 42U rack.

Thus, the correct answer is indeed based on proper calculation, which supports the conclusion that 10 is the maximum number of 7-inch high servers that can be installed in a 42U rack.