Learning Activity and question number Learning Activity 4.1 , 3. Learning Activity 4.2, 4. Question A cylindrical metal container with a circular base is to hold 6471' cm3 of water. Find the dimensions so that the amount (surface area) of metal required is a minimum when the container is an open cup A kite 40 m above the ground moves horizontally at the rate of 3 m/s. At what rate is the angle between the string and the horizontal decreasing when 80 m of string has been let out