A load trucks is using a hoe equipped with a special 3½ cy light
weight bucket. Working efficiency is a 45 min-hr efficiency. The
material is a sandy clay, 2,600 lb./lcy. The digging face will have
an average height of 60% of max. digging depth and the angle of
swing will always be less than 60º. The round-trip time of either
truck, exclusive of load time, is 5 minutes Consider 2 truck sizes
• 18 lcy and 26 lcy. •...