<human>:  Traveling from Manhattan to the Bronx, Andrew rides the subway for 10 hours, takes the train and rides for twice as much time as the subway ride, and then bikes the remaining distance for 8 hours. What's the total time he takes to reach the Bronx from Manhattan?
<bot>: How long does the train ride take? ** The train ride takes Andrew 2*10 = <<2*10=20>>20 hours.
How long does the subway and train ride take? ** Together, the subway ride and the train ride take Andrew 10+20 = <<10+20=30>>30 hours.
How long does Andrew take to reach the Bronx from Manhattan? ** With an additional bike ride of 8 hours to reach the Bronx, Andrew takes 30+8 = <<30+8=38>>38 hours to travel from Manhattan to the Bronx.
#### 38