bret and cindy took different routes to travel from point a to point e. bret took the route along a, b, c, d, and e. cindy took the route along a, f, and e and reached the destination in 2 hours. their routes are shown.
if bret's average speed was twice cindy's average speed, what was bret's average speed?
3 miles per hour
6 miles per hour
8 miles per hour
9 miles per hour

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.