Subjects time calculation

Time Conversion 7715B6

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Time Conversion 7715B6


1. **Problem statement:** (i) Convert 155 minutes into hours and minutes. (ii) A film starts at 1445 (2:45 PM) and lasts 2 hours and 20 minutes. Find the finishing time. 2. **Formulas and rules:** - To convert minutes to hours and minutes: divide total minutes by 60. - To add time, add hours and minutes separately, adjusting minutes if they exceed 60. 3. **Step-by-step solution:** **(i) Convert 155 minutes:** - Divide 155 by 60: $$155 \div 60 = 2\text{ remainder }35$$ - So, 155 minutes = 2 hours and 35 minutes. **(ii) Calculate finishing time:** - Start time is 1445, which is 14:45 in 24-hour format. - Add 2 hours and 20 minutes: - Hours: $$14 + 2 = 16$$ - Minutes: $$45 + 20 = 65$$ - Since 65 minutes is more than 60, convert: - $$65 - 60 = 5$$ minutes - Add 1 hour to hours: $$16 + 1 = 17$$ - Finishing time is 17:05 or 1705. 4. **Final answers:** (i) 2 hours 35 minutes (ii) 1705 (5:05 PM)