Q. 494.3( 11 Votes )

A solid wooden to

Answer :

Let h be the height of the cone and r be radius of its base


Now, volume of the wooden toy =



According to the question,


h = 6cm


The height of the wooden toy = 6cm + 3.5 cm


= 9.5cm


Now, curved surface area of the hemispherical part = 2 π r2


= 2π × (3.5)2


=77cm2


Hence the cost of painting the hemispherical part of the toy at the rate of ` 10 per cm2 = 77 × 10 = Rs.770

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