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

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