Question

a solid cone of radius r and height h is placed over a cylinder having same base radius and height as that of a cone. what is the total surface area of the combined solid?​

Answer 1

Answer:

Step-by-step explanation:

False

We know that , total surface area of cone of radius, r

and " "height, h = Curved surface Area + area of base =πrl+πr2

where, " "l=h2+r2−−−−−−√

and total surface area of a cylinder of bases radiur, r and height , h = Curved surface area + Area of both bases =2πrh+πl2

Hence, when we placed a cone over a cylinder, then one base in common for both .

So, total surface area of the combined solid

=[πrl+2πrh+π2=πr[l+2h+r]

=π[r2+h2−−−−−−√+2h+r]