Question

The curved surface area of a cone is 670 cm square and its radius is 15 cm then its total surface area is

Answer 1

Answer:

Solution : given: CSA=670cm^2, r=15cm

CSA(cone)= πrl

670=22/7*15*l

670/15=22/7*l

44.33=22/7*l

44.33*7/22=l

310.31/22=l

14.1=l

TSA of cone =πr(l+r)

=22/7*15(14.1+15)

=22/7*15*29.1

=22/7*436.5

=1371.85

hope you will understand

Answer 2

ANSWER:

13377.14cm^2

Explanation:

the curved surface are of a cone = πrl = 670m^2

so, total surface area of the cone is = πr(r+l) = 22/7 * 15(15+14.21) = 1377.14