questions number 22 do this question for me
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h = 7cm
r = 12/2 = 6cm
h and r are same for cylinder as well as cone
CSA of cylinder
= 246 cm²
Add bottom area
= pi * r²
= 36pi
Since cone is at the top,
We need to add CSA of cone
= pi * r * l
= pi * 6 * sqroot(h²+r²l
= pi * 6 * sqroot85
Now remaining surface area =
CSA of cylinder + area of one side + CSA of cone
= 246 + 36pi + 6pi*sqroot85
= 532.74 cm²
r = 12/2 = 6cm
h and r are same for cylinder as well as cone
CSA of cylinder
= 246 cm²
Add bottom area
= pi * r²
= 36pi
Since cone is at the top,
We need to add CSA of cone
= pi * r * l
= pi * 6 * sqroot(h²+r²l
= pi * 6 * sqroot85
Now remaining surface area =
CSA of cylinder + area of one side + CSA of cone
= 246 + 36pi + 6pi*sqroot85
= 532.74 cm²
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