Swami 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 in his friend’s vehicle to home in 10 minutes. Calculate his average speed in km/h?
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Explanation:
ANSWER IS 16
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Explanation:
Boojho Home to school to again home
From home to school distance is 3 km time taken is 30 min = (30/60) hour = 0.5 hour
And in returning from school to home time taken = 20 min = (20/60) hour = 0.33 hour
average speed = Total distance / time taken
= (3 + 3)/(0.5 + 0.33) km/h
= 7.2 km/h
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