MCQOPTIONS
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| 1. |
Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than |
| A. | 30 m |
| B. | 25 m |
| C. | 20 m |
| D. | 15 m |
| Answer» C. 20 m | |