If Jack walked 5 miles in 1 hour and 15 minutes, what was his rate of walking in miles per hour?
(A) 4
(B) 4.5
(C) 6
(D) 6.25
(E) 15
If Jack walked 5 miles in 1 hour and 15 minutes, what was his rate of walking in miles per hour?
(A) 4
(B) 4.5
(C) 6
(D) 6.25
(E) 15