volume flow rate in casting

Question

In a sand casting process, a sprue of 10mm base diameter and 250mm height leads to a runner which fills a cubical mold cavity of 100mm size.

The volume flow rate (in mm3/s) is

(a) 0.8 x 108                                                       (b) 1.1 x 105

(c) 1.7 x 105                                                       (d) 2.3 x 105