4. A water trough is 8 m long, and a cross section has the shape of an isosceles triangle that is 100 cm wide at the top with a height of 60 cm. The trough is full of water but the valve on the bottom is open and water is pouring out at a rate of 3mmin How fast is the water level dropping when the water in the tank is only 20 cm deep?

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4. A water trough is 8 m long, and a cross section has the shape of an isosceles triangle that is 100 cm wide
at the top with a height of 60 cm. The trough is full of water but the valve on the bottom is open and
water is pouring out at a rate of 3mmin How fast is the water level dropping when the water in the tank
is only 20 cm deep?
Transcribed Image Text:4. A water trough is 8 m long, and a cross section has the shape of an isosceles triangle that is 100 cm wide at the top with a height of 60 cm. The trough is full of water but the valve on the bottom is open and water is pouring out at a rate of 3mmin How fast is the water level dropping when the water in the tank is only 20 cm deep?
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