###Human: Tim rides his bike back and forth to work for each of his 5 workdays.  His work is 20 miles away.  He also goes for a weekend bike ride of 200 miles.    If he can bike at 25 mph how much time does he spend biking a week?, ### Assistant: He bikes 20*2=40 miles each day for work
So he bikes 40*5=200 miles for work
That means he bikes a total of 200+200=400 miles for work
So he bikes a total of 400/25=16 hours 
 So the answer is :  16