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Maths immediate help required plzzz help me out
A Funnel Has A Circular Top Of Diameter 20cm And A Height Of 30cm. When The Depth Of Liquid In The Funnel Is 12cm, The Liquid Is Dripping From The Funnel At A Rate Of 0.2cm^3/s. At What Rate Is The Depth Of The Liquid In The Funnel Decreasing?
from- pure maths 1 by Hugh Neil and Douglas Quadling
page numbr 183, Question 9
I need help immediately n please explain step by step
thnx in advance........

A Funnel Has A Circular Top Of Diameter 20cm And A Height Of 30cm. When The Depth Of Liquid In The Funnel Is 12cm, The Liquid Is Dripping From The Funnel At A Rate Of 0.2cm^3/s. At What Rate Is The Depth Of The Liquid In The Funnel Decreasing?
from- pure maths 1 by Hugh Neil and Douglas Quadling
page numbr 183, Question 9
I need help immediately n please explain step by step
thnx in advance........