Question

The surface area of a cone is 8,478cm^2. If the radius is 30cm, find the slant length.

PLEASE SHOW HOW YOU GOT YOUR ANSWER

Answer 1

60

Explanation:

Surface area of cone = πr ( l + r )

where r is the radius of cone

l is the slant height

From the question we can write

8478 = π × 30 ( 30+l)

We take π = 22/7 for calculation

(8478 × 7 ) / (30 × 22) = 30 + l

90 = 30 + l

l = 60

Answer 2

area-8478 cm²

r- 30 cm

slat height=l= ?

formula: surface area of the cone=πrl .

8478= 3.14×30×l

l= 8478/(3.14×30)

l= 90cm