diagram shows a vertical cross-section of a cointainer in the
form of an inverted cone of height 60cm and base radius 20cm. the
circular base is held horizontal and uppermost. water is poured
into the container at a constant rate of 40cm³/s.
i) show tt, when depth of water in the container is x cm, the
volume of water in the container is piex³/27 cm³
II)find rate of increase of x at the instant when x=2
