Rama can finish a task in 50 days. He worked for 10 days then Ravi finished the remaining task alone in 32 days. How much time will Rama and Ravi take, working together, to finish the task?
24 \( \frac{2}{9} \) days
22 \( \frac{2}{9} \) days
22 \( \frac{4}{9} \) days
24 \( \frac{1}{9} \) days
If the height of a pole is 6\(\sqrt{3}\) m and the length of its shadow is 6 m, then the angle of elevation of the sun is:
A box contains 2 black, 6 green and 4 yellow balls. If 2 balls are picked up at random, the probability that both are green is:
\( \frac{1}{22} \)
\( \frac{1}{6} \)
\( \frac{}{11} \)
\( \frac{5}{22} \)