A rectangular swimming pool has a depth of 10 feet, a width of 26 feet. Water flows into the pool at the rate of 75 feet per hour. How long will it take to fill half its capacity ?

Question

$\begin{array}{1 1} (a)\;15\;minutes \\ (b)\; 30\; minutes \\ (c)\; 35 \; minutes \\ (d)\; 40\;minutes \end{array}$