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1617=3,14 x (2a)² x 3a
514,5 = 4a² x 3a
514,5= 12a³
42,875=a³
a=3,5
jari-jari = 2a= 2x 3,5 = 7 cm
tinggi = 3a= 3 x 3,5 = 10,5 cm
luas permukaan tabung=2.πr² + π2rxt=2.22/7.7²+22/7.2.7.10,5
= 308 + 4662
= 4970
selimut tbung = 4662