Question

A man drives 100 m in the first 10 s, 90 m in the next 10 s and 120 m in 20 s, so the average speed is __________. ​

Answer 1

Explanation:

avg.speed=total distance/total time taken

then,

100+90+120/10+10+20

310/40=7.75m/s

Answer 2

Answer:

total distance = 100m + 90m + 120m

= 310m

total time = 10s + 10s + 20s

= 40s

therefore :

average speed = total distance / total time

= 310m / 40s

= 7.75m/s

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