Question

if the height and slant height of a cone are 3cm and 5 cm respectively then the radius of its base is​

Answer 1

Answer:

r=3 cm and h=4 cm

Let l be the slant height of the cone. Then,

l2=r2+h2

l2=32+42

l=5 cm

Therefore,

Area of the curved surface = πrl=722×3×5=47.14 cm2