ight solid hemispherical blocks each of diameters 4 cm are dropped into a hemispherical vessel containing some water. If the radius of the vessel be 8 cm and if the water rises just upto the brim of the vessel. Find the quantity of water initially present in the vessel.

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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.