Kimani drove from his home to school at a Speed of 30km/h and back at a speed of 20km/h. If he took 300mins, what distance did he covered
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Arianagrande69
Secondary School Physics 5+3 pts
A boy goes from his house to school by bus at a speed of 20 km/h and returns back through the same route at a speed of 30 km/h . What is the average speed of his journey?
Report by Samay111 07.04.2018
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The Brain
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Hi.
Here is your answer------
Let the distance between the school and the house is x km
speed of the boy from house to school = 20 km/hr.
Using formula, Time taken = distance/speed
So, time taken = x/20 hours.
Also,
Speed of the boy from school to the house = 30 km/hr
so, time taken = x/30 hours.
Total time taken = x/20 + x/30
= x/12 hours
Also total distance covered by boy = x +x
= 2 x km.
Using formula,
Average speed = Total distance/ Total time
= 2 x/(x/12)
= 24 km/hr.
Thus, average speed of the boy's journey is 24 km/hr.
Hope this will help u.
Have a nice day.
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Answer:
120km
Step-by-step explanation:
total distance will be 2x.
