Question
Betty took 2 h 30 min to make a kite. Xuan took 35 min less time than Betty while Yen took 50 min longer that Xuan to make a kite. How long did Yen take to make a kite? Express your answer in h and min.
4 m

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Betty took 2 h 30 min to make a kite. Xuan took 35 min less time than Betty while Yen took 50 min longer that Xuan to make a kite. How long did Yen take to make a kite? Express your answer in h and min.