Question
Ethan spent 4 h 50 min to complete his Social Science and Japanese assignments. He spent 30 min more on his Social Science assignment than his Japanese assignment. How long did he take to complete his Japanese assignment?
4 m

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Ethan spent 4 h 50 min to complete his Social Science and Japanese assignments. He spent 30 min more on his Social Science assignment than his Japanese assignment. How long did he take to complete his Japanese assignment?