Cartons are to be conveyed using a 200-long roller-supported belt conveyor with WBR dimensions of 27 and rollers on 6 centers. A conveyor speed of 100 fpm is to be used.

The conveyor is inclined at an angle of 15. Five types of cartons are to be conveyed on the belt. Their weights and lengths are as follows:

Carton Weight Length A 15 lb 12 B 20 lb 18 C 30 lb 18 D 40 lb 24 E 30 lb 30 For purposes of computing horsepower, the load on the conveyor should be based on cartons being distributed in the following sequence along the conveyor (A, A, B, B, C, C, C, D, D, D, E), with a 6 space between cartons. Assume the sequence moves along the conveyor with As followed by Bs followed by Cs, etc. Determine the following values:

a. L, based on the heaviest condition.

b. L, based on the lightest condition.