Question

Tolong yaaaaaa.... no. 6

Answer 1

Misal r = 2x dan t = 5x
luas selimut tabung = 2πrt
=> 251,2 = 2 (3,14) (2x) (5x)
=> 251,2 = 62,8 x^2
=> x^2 = 251,2/62,8
=> x^2 = 4
=> x = √4 = 2
a. jari-jari = r = 2x = 2(2) = 4 cm
b. tinggi = t = 5x = 5(2) = 10 cm