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Question

1. LSA = __________ TA = __________

Answer 1

To find LSA find length of cone side

Length of cone side = l = 4/Sin30 = 8m .

LSA = ¶rl = 3.14 × 4 × 8 = 100·48 m².

TA = LSA + Base Area

= 100·48 + ¶r² = 100.48 + 3·14 × 4²= 150·72 m²

Answer 2

TSA = 48 pi

= pir^2 + pirl where l= slant side of the cone

If you just want the side area, without the top circular area

then SA = just pirl = 32pi