Question
Rael spent 2 h 40 min to complete his English and Japanese assignments. He spent 30 min more on his English assignment than his Japanese assignment. How long did he take to complete his Japanese assignment?
4 m

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Rael spent 2 h 40 min to complete his English and Japanese assignments. He spent 30 min more on his English assignment than his Japanese assignment. How long did he take to complete his Japanese assignment?