Sand is being poured onto a conical pile at the constant rate of 50 cm3/minute such that the height of the cone is always one half of the radius of its base. How fast is the height of the pile increasing when the sand is 5 cm deep?

Sand is being poured onto a conical pile at the constant rate of 50 c $m^{3}$ /minute such that the height of the cone is always one half of the radius of its base. How fast is the height of the pile increasing when the sand is 5 cm deep?

Match the items on the right to the items on the left.