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soal a)
L. Selimut = πrs
L. selimut = 22/7 x 7 x 50
L. selimut = 1100 cm²
soal b)
L. alas = πr²
L. alas = 22/7 x 7 x 7
L. alas = 154 cm²
soal c)
Tinggi = √50² - 7²
Tinggi = √2500 - 49
Tinggi = √2451
Tinggi = 49,5075 cm