The internal and external diameter of a hemispherical. Hollow vessel is 20 and 28 cm .find the cost of painting the vessel at ruppess 40 cm square
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external radius (R)=14 cm
internal radius (r)=10 cm
area of the vessel=3*pie*(R^2-r^2)
=3*pie*(196-100)
=3*pie*96
=905.1 cm^2
cost of painting = 40*905.1
=36204 rs
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internal radius (r)=10 cm
area of the vessel=3*pie*(R^2-r^2)
=3*pie*(196-100)
=3*pie*96
=905.1 cm^2
cost of painting = 40*905.1
=36204 rs
HOPE IT HELPS U:__
mark as brainliest
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