Answer :

h = 15 cm,


for cone:


Diagram


TSA of remaining solid


= CSA of cylinder + Area of base of cylinder


+ CSA of cone


= 2πrh + πr2 + πrl = πr[2h + r + l]


= π 8[2(15) + 8 + 17] = 8π[30 + 25] = 440π cm2


OR




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