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vol tabung =π r² t
22/7 x7x 7x 40=6160
6160÷2=3080
vol kaleng= π r² t
3080= 22/7 x 7x7xt
3080= 154 t
t= 3080÷154
t= 20 cm
perbandingan= 40cm: 20cm ( dicoret dengan angka yang sama )
setara dengan 2 :1