Originally Posted by

**InAHole** No idea where to start and trying to find solutions to 3 problems, here we go.

1) The trunk of a tree is approximately cylindrical in shape and has a diameter of 1m when the height is 15m. If the radius is increasing at mm/year and the height is increasing at 0.4m/year, find the rate of increase of the volume of the trunk?

2) At 1:00 pm ship A was 80 km south of ship B. Ship A is sailing north at 30km/h and ship B us sailing east at 40 km/h. How fast is the distance between them changing at 3:00 pm?

3) A man on a bridge 10m above the water reels in a fish line at the rate of 1m/s. Find the rate of change of the angle between the line and the water level when 20 m of the line is let out.

Full solutions would be greatly appreciated with little side notes plz. Need to make sense of it all haha, thx for the help everyone.