Which of the following best approximates the percentages of sand, clay, and silt in a sandy loam? use the soil texture table below to answer.

sand 40
clay 30
silt 30

sand 60
clay 10
silt 30

sand 25
clay 15
silt 60

sand 20
clay 60
silt 20

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.