Distance traveled by Xiao Pang: 45×65=2925 (m)
Xiao pang's journey is also a journey pursued by teachers.
Distance/time = speed
Teacher's speed: 2925÷ 15= 195 (m/min)
Comprehensive formula: (15+30) × 65 ÷15 =195 (m/min).
A: The head teacher's riding speed is 195 meters per minute.