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Unformatted text preview: a = 20' b = 12' Find c 256 c = 16' Answer to # 4 16' 20 5 A footing has a dimension of 3' x 3'. A total of 18,000 lb. of force is distributed equally on the footing. What is the pressure on the footing in lb / sq.ft. = 20 Answer to # 5 200' x 80' x 0.583' = 9,333.33 ft 3 9,333.33 ft 3 x 1 yd 3 / 27 ft 3 = 345.68 yd 3 345.68 yd 3 2 ft 2 x 5' = 10 ft 3 1 ft 3 = 7.48 gal 10 ft 3 x 7.48 gal / 1 ft 3 = Vol = 4 ft 2 x 7.25' = 29 ft 3 Water = 62.4 lb / ft 3 62.4 lb / ft 3 x 29 ft 3 = a 2 = b 2 x c 2 c 2 = a 2b 2 c 2 = 400  144 = 3' x 3' = 9 ft 2 18,000 lb / 9 ft 2 2,000 lb / ft 2 2,000 lb / ft 2...
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 Spring '12
 desormeaux

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