Question

Find the curved surface area of cone given radius of its base is 3m and height is 4m​

Answer 1

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

Answer 2

Step-by-step explanation:

area of curved surface is πrl

so 722 ×3×5=47.14