The excavation crew digs the rectangular hole in ground measuring 110 yd x 50 yd x 15 yd (length x width x depth) to hold basement for the new office building which is under construction. 5 identical dump trucks, each with the measured capacity of 20 yd^3, are used to haul debris away. Suppose all trucks are filled to their full capacity, and all trucks take same number of trips. How many trips should each truck make to remove all material? Let carefully uncertainty in measured values. Compute both best and worst case possibilities.