2. A man covers a distance of 40 km. He covers
first 10 km at 10 km/h, second 10 km at
20 km/h, third 10 km at 30 km/h and last
10 km at 40 km/h. What is the average speed
of man?
if you are correct I will make you brainlist
Answers
Answered by
0
Answer:
His average speed will be 1 hour 46 minutes
Answered by
2
Average speed = Total Distance/Total time
Total distance = 40 km
Total Time = T1 +T2+T3+T4
Time = Distance/speed then T1 = 10/10 = 1hour
T2=10/20=1/2hour
T3=10/30=1/3hour
T4=10/40=1/4hour
T=T1+T2+T3+T4=1 + 1/2 + 1/3 + 1/4= 25/12 hour =2hour 5min
Average speed = 40km/25/12hour=19.2 km per hour
The average speed of the man is 19.2km per hour
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