Question
Zeph took 30 min to drive from his house to the factory and 2 h 31 min to deliver goods from the factory to various places. He finished delivering the goods at 17 38. At what time did Zeph leave his house? (Give your answer in 24-hour clock format.)
1 m

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Zeph took 30 min to drive from his house to the factory and 2 h 31 min to deliver goods from the factory to various places. He finished delivering the goods at 17 38. At what time did Zeph leave his house? (Give your answer in 24-hour clock format.)