Aconical tank (with vertex down) is 10 feet across the top and 12 feet deep. if water is flowing into the tank at a rate of 10 cubic feet per minute, find the rate of change of the depth of the water when the water is 8 feet deep.

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Step-by-step explanation:

; rate of change , we must find the rate of change of the depth

5h=12r; ; deriving → → h=8 then ≅ 0.286

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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