Q. 263.6( 5 Votes )

Answer :

Radius of base = 21cm and its volume = 2/3 × volume of the hemisphere

Hence surface area of the toy = Surface area of the cone + Surface area of hemisphere

= π r () + 2 π r^{2}

= π (21)[35 + 2 × 21]

= 5082 cm^{2}

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PREVIOUSA hemispherical depression is cut out from one face of a cubical wooden block of edge 21 cm, such that the diameter of the hemisphere is equal to the edge of the cube. Determine the volume and total surface area of the remaining block.NEXTA solid is in the shape of a cone surmounted on a hemi-sphere, the radius of each of them is being 3.5 cm and the total height of solid is 9.5 cm. Find the volume of the solid.