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LP = 1 (pl) + 2(pt) + 2(lt)
= (14X20) + 2(20X10) + 2(10X14)
= 280 + 400 + 280
= 960 Cm2
1/2 tabung = 1/2 2 πr(r+t)
= 22/7 x 7 (7 + 20)
= 22 x 27
= 594
kita gabung = 1554 cm 2 (D)
mohon koreksi semoga membantu
= (2(20*10+14*10) + 20*14 + (22/7*7(7+20)
= 680 + 280 + 594
= 1554