A Trailer $8$ Ft By 8 $8$ Ft By 8 $5$ Ft, Is Filled with Coal

Multiple Choice

A trailer $8$ ft. by $8$ ft. by $5$ ft., is filled with coal. Given that $1 \mathrm { ft }$ ³ of coal weights $40 \mathrm { lb }$ and $1 \text { ton } = 2,000 \mathrm { lb }$ , how many tons of coal are in the trailer?

A) 8.4 tons
B) 6.4 tons
C) 7.9 tons
D) 5.4 tons
E) 6.9 tons