Chapter 10, Problem 103RQ

*10.103 Suppose you were planning to move a house by transporting it on a large trailer. The house has an estimated weight of 45.6 tons $\left(\text{1 ton = 2000 lb}\right)$. The trailer is expected to weigh 8.3 tons. Each wheel of the trailer will have tires inflated to a gauge pressure of 85 psi (which is actually 85 psi above atmospheric pressure). If the area of contact between a tire and the pavement can be no larger than $\text{100}\text{.0 in}{\text{.}}^{\text{2}}\left(\text{10}\text{.0 in}\text{. }\times \text{ 10}\text{.0 in}\text{.}\right)$, what is the minimum number of wheels the trailer must have? (Remember, tires are mounted in multiples of two on a trailer. Assume that atmospheric pressure is 14.7 psi.)