Paheli walks to her school which is at a distance of 2 km from her house in 20 minute. On reaching she finds that the school is closed and returns back by a bicycle with her friend with a speed of 12 km/h. Her average speed in km/h is Option 1. 6
3. 10
2. 8.
4. 12
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Answer:
2.8.
Step-by-step explanation:
To find Paheli's average speed for the entire journey, we can calculate the total distance she covered and the total time taken.
Distance walked to school = 2 km
Distance covered while returning by bicycle = 2 km (since she returns by the same route)
Total distance = 2 km + 2 km = 4 km
Time taken to walk to school = 20 minutes = 20/60 hours = 1/3 hours
Time taken while returning on a bicycle at 12 km/h = Distance / Speed = 2 km / 12 km/h = 1/6 hours
Total time taken = Time to walk + Time to return = 1/3 hours + 1/6 hours = 1/2 hours
Average speed = Total distance / Total time = 4 km / (1/2 hours) = 4 km * 2 = 8 km/h
Therefore, Paheli's average speed for the entire journey is 8 km/h, which corresponds to option 2.
Answer:
8
Step-by-step explanation: