human
Max can mow the lawn in 40 minutes. If it takes him twice that long to fertilize the lawn, how long will it take him to both mow and fertilize the lawn?
assistant
How long does it take Max to fertilize the lawn? ** It takes Max 2 * 40 minutes = <<2*40=80>>80 minutes to fertilize the lawn.
How long does it take Max to both mow and fertilize the lawn? ** In total, Max takes 80 minutes + 40 minutes = <<80+40=120>>120 minutes to both mow and fertilize the lawn.
#### 120