New SUPER MARIO BROS. U Community
るいawsedr1
これを解けた人にはフォローします。 12Kmのマラソン大会がありました。A君は分速1Km B君は分速2Km C君は分速3Km D君は分速4Kmです。マラソン大会が終わるのはなん分後ですか。
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