Question

1) Total surface area of a cone is 616 sq.cm. if he slant height of cone is three times the radius of its base,then find its slant height.
plz solve it fast and in proper steps
plz plz plz as fast as u can....

Answer 1

TSA of cone = 616sq.cm
πr(l+r) = 616
πr(3r+r) = 616
r × 4r = 616×7/22
4r^2 = 196
r^2 = 196/4
r = √49
r = 7

slant height = 3r
= 3 × 7
= 21

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Answer 2

Answer:hope this will help you!

Step-by-step explanation:TSA of cone = 616sq.cm

πr(l+r) = 616

πr(3r+r) = 616

r × 4r = 616×7/22

4r^2 = 196

r^2 = 196/4

r = √49

r = 7

slant height = 3r

= 3 × 7

= 21

plzz mark as brainliest answer....