A wooden toy is in the form of a cone surmounted on a hemisphere. The diameter of the base of the cone is 5cm and its height is 4cm. Find the cost of painting the toy at the rate of Rs. 5 per `1000c m^2dot`

Explanation

Diameter of the cone,`d=5cm` and height, `h=4cm`

Total area, `A = pirl+2pir^2`

`A=pir(l+r)`

Here `l`=slant height and `r`=radius

`A=22/7xx5/2(sqrt(r^2+h^2)+5/2)`

`A=110/14(sqrt(2.5^2+4^2)+2.5)`

`A=110/14xx7.21`

`A=56.59cm^3`

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