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

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