Surveying
If two points differing by 1° of latitude and of the same longitude is 110 km apart on the earth, then two astronomical positions on the moon is about

25 km
10 km
30 km
50 km

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Surveying
Dumpy level is most suitable when

the instrument is to be shifted frequently
many readings are to be taken from a single setting of the instrument
fly levelling is being done over long distance
All of these

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