1. An open cylindrical tank of radius 70 cm contains 385 liters of a liquid. Find:
(a) The volume of liquid in the tank in cm3.
(b) The height of liquid in the tank.
(c) The total surface area of the liquid in contact with the cylindrical tank.
2. An open cylindrical tank of radius 14 cm and height 30 cm is to be painted on its exterior surfaces. Find the total surface area that needs to be painted.
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