Ajay walked at an average speed of 8 km per hour for 45 minutes and then walked at an average speed of 12 kilometre per hour for 40 minutes.What was his average speed for the whole journey?
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Answer:
11.2km/hour
Step-by-step explanation:
Ajay walked at an average speed of 8 km per hour for 45 minutes and then walked at an average speed of 12 kilometre per hour for 40 minutes.
so ajay walked =45*8/60 + 40*12/60
= 6 + 8
= 14km
time ajay walked = (45+40)min
=85min = 1hour 25min
avg. speed = total disance/total time
=14/1.25
=11.2km/hour
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