Samira can do a piece of work in 9 days. Sujata can do \( 13\tfrac{1}{3} \) of the same work in 3 days. If Samira worked alone for 2 days and left, then, in how many days can Sujata alone complete the remaining work?
Simplify the following expression.
\( 15 - \{\,4 - (4 - 1)\,\} + 27 \)
Walking towards a bus stop at \( \frac{5}{7} \) of his usual speed, Rakesh missed the bus by 10 minutes. What is the usual time that Rakesh takes to reach the bus stop just in time for the bus?