A ladder is set at 20 feet of working length. Using a 4-to-1 setup ratio, how far should the base be from the wall?
Correct Answer
B) 5 feet.
At a 4-to-1 ratio, the base is one foot out for every four feet of ladder length: 20 / 4 = 5 feet.
Why This Is the Correct Answer
At a 4-to-1 ratio, the base is one foot out for every four feet of ladder length: 20 / 4 = 5 feet.
Why the Other Options Are Wrong
Option A: 4 feet.
4 feet. is below the supported result for ladder safety; it likely uses the wrong base, period, or account bucket.
Option C: 8 feet.
8 feet. is above the supported result for ladder safety; it likely adds an unsupported amount or compares the wrong financial base.
Option D: 10 feet.
10 feet. is above the supported result for ladder safety; it likely adds an unsupported amount or compares the wrong financial base.
Memory Technique
Checking Setup money test: bucket before math for ladder safety.
Reference Hint
Study anchor (closed-book): memorize Ladder safety from Cal/OSHA Title 8 Construction Safety Orders; CSLB Law and Business. / Title 8 ladder setup and safe access; know the rule or calculation trigger without relying on exam-room lookup.
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