A wooden toy is in the form of a cone surmounted on a hemisphere. The diameter of the base of the cone is 6 cm and its height is 4 cm. Find the cost of painting the toy at the rate of Rs. 5 per 1000 cm2.
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Answer:
Radius =3cm
Height =4cm
CSA=
22/7*3*5
=3.14*3*5
=47.1cm2
Cost =5/1000*47.1
=Rs. 0.2355
Radius of hemisphere=3cm
CSA =2*22/7*3*3
=56.52cm2
Cost,=5/1000*56.52
=282.6/1000
=0.2826
Total cost of painting =0.2355+0.2826
=Rs 0.5181
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