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Exercise 1: End of chapter activity

Thobeka is planning an end of term party for her classmates on a Saturday afternoon, and needs help with her measurement conversions and time management. Answer the questions that follow, and don't forget to show your working out.

1. Thobeka has asked her friends to bring music on CD's. She has 3 albums she wants to play that are 45 minutes, 50 minutes and 67 minutes long. If she plays her 3 albums back-to-back, how long will the music play for? Give your answer in hours and minutes.

2. Thobeka decides she needs to be organised in her party planning and wants to make a timetable, to carefully plan her day and make sure she gets everything ready in time. She has some free time the night before the party and time in the morning, on the day of the party.

She draws up the following list and estimates how long everything will take:

• Sweep floors (1 hour, 15 mins)
• Set up table and chairs (15 minutes)
• Make party packs (1 hour 40 minutes)
• Bake cakes (45 minutes to prepare, 1 hour 30 minutes to bake in oven)
• Get dressed (10 minutes)
• Wash dishes (20 minutes)

She also really wants to watch a movie on TV the night before the party, that starts at 8:30 p.m. Bearing this in mind, and the fact that she needs 8 hours of sleep, draw up a timetable for Thobeka that includes all the things she has to do. Remember, some things she may be able to do at the same time - for example, do the dishes while the cakes are baking in the oven. Also, some things should be done before others (there is little point sweeping the floor before she bakes the cakes, because she may spill flour, for example!)

1. 45 + 50 + 67 minutes = 162 minutes = 2 hours, 42 minutes