Question
Valen spent 3 h 50 min to complete his Japanese and History assignments. He spent 30 min more on his Japanese assignment than his History assignment. How long did he take to complete his History assignment?
4 m

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Valen spent 3 h 50 min to complete his Japanese and History assignments. He spent 30 min more on his Japanese assignment than his History assignment. How long did he take to complete his History assignment?