Respuesta :

60 miles per hour
so 156 miles = 156 /60 = 2.6 hours 
0.6 x 60 = 36
so 2.6 hours  = 2 hours 36 minutes

Kim leaves Rotherham at 7: 30AM
7:30 AM + 2 hours 36 minutes = 10:06 AM

Answer
Kim arrives in London after 10AM