Chapter 44, Problem 112A

For each of the following problems, substitute the given values in the formula and solve for the unknown. Check each answer. Round the answers to 2 decimal places.

The length of cut, L, in inches, of a workpiece in a lathe is equal to the product of the cutting time, in minutes, T; the tool feed, F, in inches per revolution; and N, the number of revolutions per minute of the workpiece: $L=TFN.$ Determine N when $L=18$ inches, $T=2.5$ minutes, and $F=0.050$ inch per revolution.