Question

From a circular cylinder of diameter 10cm and height 12cm,a conical cavity of the same base radius and of the same height is hollowed out.Find the volume and the whole surpace of the remaining solid. Leave the answer in pie.
plz solve ASAP

Answer 1

Volume of cylinder = pie .25.25.12

volume of cone = 1/3. pie. 25.25. 12

vol. of remaining solid = 2/3. 25. 25.12 pie= 8×625 pie= 5000pie

surface area,of cylinder = 2pie ×5 ( 12+5) = 170 pie

surface area of cone = pie. 5.( √144+25 +5) = pie.5. 18 = 90 pie
area of base = pie .25 = 25pie
so. surface area of remaining solid = TSA of cylinder + TSA of cone - 2pie. r.r
= 170 pie + 90 pie - 2×25 pie
= 170 pie + 90 pie -50 pie
= 210 pie

Answer 2

Check the attachment. Hope it helps