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Thanks a lot for the answer and it's thorough explanation. Things are a lot clearer now.
Water flows through a pipe into an empty cylindrical tank.
The tank has a radius of 40 cm and a height of 110 cm.
(a) Calculate the volume of the tank.
(b) The pipe has a cross-sectional area of 1.6 cm^2.
The water comes out of the pipe at a speed of 14 cm/s.
How long does it take to fill the tank?
Give your answer in hours and minutes, correct to the nearest minute.
(c) All the water from the tank is added to a pond which has a surface area of 70 m^2.
Work out the increase in the depth of water in the pond.
Give your answer in millimetres, correct to the nearest millimetre.
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