A person swims 100 m in the first 40 s, 80 m in the next 40 s and 45 m in the last 20 s. What is the average speed?
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Answer:
average speed=1.25m/s
Explanation:
average speed=total distance travelled/total time
average speed=100+80+45/40+40+20
average speed=125/100
average speed=1.25m/s
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