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1. |
If angle of tilt is equal to 10 seconds of arc and length of one division is equal to 2.5 mm in a spirit level then what is radius of tube? |
A. | 51.5 m |
B. | 51.5 mm |
C. | 25.5 m |
D. | 25.5 mm |
Answer» B. 51.5 mm | |