分析的很好,思路对,思维缜密.很好
0.25*340=0.15*340+[0.25+(0.9-0.5)+0.15]*V
V=(0.25*340-0.15*340)÷ [0.25+(0.9-0.5)+0.15]
V=(85-51)÷0.8
v=34÷0.8=42.5m/s
分析的很好,思路对,思维缜密.很好
0.25*340=0.15*340+[0.25+(0.9-0.5)+0.15]*V
V=(0.25*340-0.15*340)÷ [0.25+(0.9-0.5)+0.15]
V=(85-51)÷0.8
v=34÷0.8=42.5m/s