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-d : 28 cm = r : 14
dit :
-luas selimut = phi.r.s
phi x r x s
=22/7 x 14 x 50
=22/7 x 700
=22 x 100 (karena 700 dibagi 7)
=2.200 cm2
d = 28 cm r = 14 cm
s = 50 cm
Jawab : luas selimut = πrs
=22/7.14.50(coret 7 dan 14)
=22.2.50
=2200
Jadi, luas selimut kerucut tersebut adalah 2200 cm²