Topsoil is stripped 6 in. deep over 12,000 sq ft. What volume is stripped?
Correct Answer
D) 222.2 cu yd
Six inches is 0.5 ft. Volume is 12,000 x 0.5 = 6,000 cu ft; 6,000 / 27 = 222.2 cu yd.
Why This Is the Correct Answer
Six inches is 0.5 ft. Volume is 12,000 x 0.5 = 6,000 cu ft; 6,000 / 27 = 222.2 cu yd.
Why the Other Options Are Wrong
Option A: 111.1 cu yd
topsoil stripping volume, choice a: 111.1 cu yd reflects a different quantity stage than the final takeoff.
Option B: 444.4 cu yd
topsoil stripping volume, choice c: 444.4 cu yd reflects a different quantity stage than the final takeoff.
Option C: 6,000 cu yd
topsoil stripping volume, choice d: 6,000 cu yd is an intermediate from the steps (Volume is 12000 x 0.5 = 6000 cu ft;); the calculation continues to 222.2 cu yd.
Memory Technique
Keep a rough-in sticker beside topsoil stripping volume: if one number is skipped, the option drifts away from 222.2 cu yd.
Reference Hint
Open Pipe and Excavation Contracting, 2011; use by topic index - earthwork volume / swell / shrink to confirm that Six inches is 0.5 ft.
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