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= 22/7 x (2,5)^2 x 7
= 22 x 6,25 = 137,5 dm3
Karena dm3 = liter
Maka mencari harga minyak yg terdapat dalam drum
= 137,5 x 2700 = Rp 371.250 :)
= 3850÷14
=Rp.2750