The 2inch PVC pipe that joins a 45degree elbow to the long b

The 2-inch PVC pipe that joins a 45-degree elbow to the long branch of a 45-degree wye is 24 inches long. How far are the two fittings offset? A. 19 7/8inches B. 20 7/16inches C. 20 5/8inches D. 20 7/8inches

Solution

ans

An offset between two 45s needs a length of pipe that is 1.41 multiplied be the desired offset. You will need subtract what the 45s take up from the center of the fitting to the inside edge of the fittings hub. That won\'t be much, but necessary if you need to be exactly 42 inches.
42 divided by 1.41 is 59.22. Just figure it\'s 59 1/4 inches less the fittings as stated.