問2

(1)\(42195m\div\left(3600\times2+60\times7+12\right)s=5.53\)m/s

 

(2)\(1500m\div\left(60\times15+57\right)s=1.57\)m/s

 

(3)\(552600m\div\left(3600\times3+60\times8\right)s=49.0\)m/s