AlgebraDifficulty 2.0JuniorFind the answerUnited Kingdom
Tom had ten sparklers of the same size. Each sparkler took 2 minutes to burn down completely. He lit them one at a time, starting each one when the previous one had one tenth of the time left to burn. How long did it take for all ten sparklers to burn down?
(A) 18 minutes and 20 seconds (B) 18 minutes and 12 seconds (C) 18 minutes (D) 17 minutes (E) 16 minutes and 40 seconds
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