A bus covers 100 km in first 2 hours, 64 km in the next 1 hour and 72 km in the next 2 hours. Find the average speed of the bus during the hole journey.
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Step-by-step explanation:
- 100km+64km+72 km=236
- there are 3 periods of time
- so 236÷3=78.6 m per second
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