21. Kiran covers a certain distance, travelling at a speed of 12 km/hr for=rd the distance and a 8
km/hr for the remaining distance. Find his average speed for the entire journey
(a) 6 km/hr (b) 10 km/hr (c) 9 km/hr (d) 12 km/hr (e) None of these
Answers
Answered by
1
Answer:
the answer is 10 km/ hour
Step-by-step explanation:
speed=distance/time
speed= 12km per hour + 8 km per hour
speed=20km/2 hour
speed=20/2=10
so the answer is 10 km/hr
Answered by
1
Answer:
avg speed = total distance / total time
total distance=1/3+2/3=1
total time=1/3*12+2/3*8
=4/36
=1/9
avg speed=1/1/9=9km/h
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