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pertama cari r
luas alas kerucut = phi . r^
154 = 22/7 . r^
154 . 7 = 22r^
1078 = 22 r^
1078/22 = r^
49 = r^
7 = r
lalu cari s
s^ = r^ + t^
= 7^ + 24^
= 49 + 576
= 625
s = 25
baru cari luas selimut
luas selimut = phi . r . s
tinggal dimasukkan saja angkanya
154 =
=
=
= 49
r =
s =
s =
s =
s =
s = 25 cm
L.selimut =
L.selimut =
L.selimut = 550