EM-1074
Rate and average speed
E Math · Secondary 3 · Hard · Rate and average speed
A car travels at a constant speed of 18 m/s for 30 s and then at 12 m/s for 20 s. Find its average speed over the whole 50 s journey.
- 15.6 m/s
- 16.0 m/s
- 14.4 m/s
- 13.0 m/s
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