Question

solid is in the form of a cone mounted on a hemisphere of radius 7 cm the height of the cone is 3.5 cm find the volume and total surface area of cone​

Answer 1

Answer:

Step-by-step explanation:

radius of the cone=radius of the hemisphere=7cm

height of the cone = 3.5 cm

volume of the figure=volume of the cone+volume of the hemisphere

                                 =1/3πr²h+2/3πr³

                                 =πr²[1/3h+2/3r}

                                  =22/7[1/3*3.5*+2/3*7]

                                  =154[3.5/3+14/3}

                                  =154[17.5/3]

                                  =51.3*17.5

                                   =897.75 cm3

surface are of cone=πr[l+r]

                                =first we need to find the value of 'l'i.e...slant height

                                 l=√r²+h²

                                   =√61.25

now by using the total surface area we can find the answer easily

and this is the task that i leave for you.because if we copy each and everything we Would not able to do OTHER type of problems ..so use your skills and knowledge to complete it

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