In the following problems, use for the specific weight of fresh water and for the spec...

In the following problems, use for the specific weight of fresh water and for the specific weight of concrete if U.S. customary units are used.With SI units, use for the density of fresh water and for the density of concrete. (See the footnote on page 222 for how to determine the specific weight of a material given its density.)

The cross section of a concrete dam is as shown. For a 1-m-wide dam section determine (a) the resultant of the reaction forces exerted by the ground on the base AB of the dam, (b) the point of application of the resultant of part a, (c) the resultant of the pressure forces exerted by the water on the face BC of the dam.