Question

A toy is in the form of a cone of radius 3cm mounted on a hemisphere of same radius. The slant height of the cone shape is 10cm .find the total surface area of the toy

Answer 1

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Answer 2

RADIUS OF THE CONE = RADIUS OF THE HEMISPHERE = r = 3 cm

SLANT HEIGHT OF THE CONE = l = 10 cm

∴ TOTAL SURFACE AREA OF THE TOY = 2πr² + πrl sq. units

                                = [( 2 × 3.14 × 3 × 3 ) + (  3.14 × 3 × 10 )] cm²

                                = ( 56.52 + 94.2 ) cm²

                                = 150.72 cm²

∴ TOTAL SURFACE AREA OF THE TOY= 150.72 cm²