Answer:
1,187 bu/hr
Step-by-step explanation:
4.8 mi/hr
240 inches
Efficiency: 85% (0.85)
120 bushels/acre
1 acre = 6 272 640
1 mile = 63 360 inches
4.8 miles = 304 128 inches
120/6 272 640 x 240 = 5/1089 (bushels/inch)
5/1089 x 304 128 x 85% = 1 186.9 = 1187 bu/hr
Wow, that's hard for me :) Hope it's helpful