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Mathematics 8 Online
OpenStudy (anonymous):

A water is in the shape of a cone. Tank is 10m high and has a radius of 3m. If the water is 5m deep, what is the surface area of the top of the water?

OpenStudy (campbell_st):

well it depends on how you define top... |dw:1408950141850:dw|

OpenStudy (lxelle):

We have to calculate the radius of the section of the cone at 5m-deep. If at 10m the radius is 3m, at 5m the radius is 1,5 m πr² is the surface: π(1,5 m)² at 5 m deep =???

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