The ratio of the length of a tree to its shadow is 1 : \(\frac{1}{\sqrt{3}}\). The angle of the sun's elevation is:
How many kilometres are there in 1 mm?
Both \( \frac{1}{100000} \) and 0.000001
0.0000001
0.000001
\( \frac{1}{100000} \)
A can finish a task in 20 days and B can finish the same task in half the time taken by A. Working together, what part of the task can they finish in a day?
\( \frac{2}{6} \)
\( \frac{1}{2} \)
\( \frac{3}{20} \)
\( \frac{1}{18} \)