56 P6.SP.TL.18012232
Level 3
Jake walks to school at an average speed of 4 km/h every day. One day, after walking a distance of 1 km, he realised that his watch was slow. So, he ran at a constant speed and managed to reach his school just on time. Later, he calculated that if he had run at this speed right from the start of the journey, he would have reached his school 5 minutes earlier. What was his running speed?
3 m
DST triangle Average speed Different speed Unit conversion Duration
57 P6.SP.TL.18012234
Level 3
Ryan drove at an average speed of 70 km/h for the first 2 hours of the journey. He then increased his average speed by 15 km/h and drove for another 3 hours until he reached his town. Find his average speed for the whole journey.
3 m
DST triangle Average speed Different speed
58 P6.SP.TL.18012235
Level 3
Jesse left home at 6.15 a.m. and drove towards the mountain which was 802 km away. For the first 210 km, she was travelling at 70 km/h. Then she increased her speed by 4 km/h and completed the remaining journey.
  1. How long did she take for her whole journey?
  2. At what time did she reach the mountain?
3 m
DST triangle Average speed Journey by parts Different speed Start end time
59 P6.AG.JC.22050602
Level 3 PSLE
The table shows the number of glass bottles collected by 3 boys.
  1. Find the total number of glass bottles Abe, Bob and Tim collected. Express the answer in terms of m in the simplest form.
  2. If m = 9, find the average number of glass bottles the 3 boys collected.
3 m
Algebra in 1 variable Algebra simplifying Algebra substitution Average
60 P6.SP.TL.18012236
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.
3 m
DST triangle Average speed Different speed Duration

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