Which of the following methods is used for measuring earthwork?
- AArea and volume shall be nearest worked out to 0.01 m² and 0.01 m³Correct
- BVolume shall be worked out to nearest to 0.02 m³
- CThe area shall be worked out to nearest to 0.02 m²
- DArea and volume shall be worked out to nearest to 0.03 m² and 0.03 m³
Solution
Concept
In earthwork, area is worked out to the nearest 0.01 m² and volume to the nearest 0.01 m³.
Step-by-step solution
1. IS 1200 gives the rules for measuring building and civil works. 2. For earthwork, length is measured to the nearest 0.01 m. 3. Area is worked out to the nearest 0.01 m². 4. Volume is worked out to the nearest 0.01 m³. 5. So option A is correct.
Explanation
As per IS 1200 measurement rules, earthwork dimensions are measured to the nearest 0.01 m. So area is rounded to the nearest 0.01 m² and volume to the nearest 0.01 m³. Option A matches this rule.
Why the other options are wrong
B: volume is rounded to 0.01 m³, not 0.02 m³. C: area is rounded to 0.01 m², not 0.02 m². D: 0.03 m² and 0.03 m³ are not standard values.
Shortcut
Earthwork: L to 0.01 m, A to 0.01 m², V to 0.01 m³. All are 0.01.
Common mistake
Students mix up the earthwork rule with odd values like 0.02 or 0.03, which are not used in IS 1200.
Correct answer: A) Area and volume shall be nearest worked out to 0.01 m² and 0.01 m³