Aman walks to his school which is at a distance of 4 km from his home in 30 minutes. On reaching he finds that the school is closed and comes back by a bicycle with his friend and reaches home in 20 minutes. His average speed in km/h is
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Step-by-step explanation:
Aman goes home to school to again home
From home to school, distance is 3 km and time taken is 30 min. = 30/60 hr = 0.5 hr.
And, in returning from home to school time taken = 20 min = 20/60 hr = 0.33hr.
Average Speed = Total distance / time taken
Average Speed = (3+3) / (0.5 + 0.33) km/hr
Average Speed = 7.2km/hr
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