Level 3
Joy took 2 hours 20 minutes to complete an artwork. Dane took 60 minutes less to complete the artwork. How long did Dane take to complete the artwork? Express the answer in h and min.
Level 3
Jimmy drove at an average speed of 72 km/h for 4 hours. He then reduced his average speed by 18 km/h and continued for another 5 hours before he reached his destination. Find his average speed for the whole journey.
Level 3
Mandy celebrated her birthday on Friday at 21 45. Dean celebrated his birthday 15 hours later. (On what day and at what time did Dean celebrate his birthday?)