Question

its slant height
3. The height of a cone is 20 cm and the radius of the base 15 cm. Find its (1) total surface area
and (ii) curved surface area. [Use = 3.14]​

Answer 1

Step-by-step explanation:

radius=15, slant height =???, h=20cm

slant height=√h²+r² =√(15)²+(20)²=√225+400=√625=25cm

Curved surface area of cone=π(r)(l) =3.14×14×25=1099 cm²

total surface area of cone=πr(r+l) =3.14×15×(15+25)=47.1×49=1884cm²

Answer 2

Answer:

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