Question

an object travels 18m in 4sec and next 18m in 2sec . calculate the average speed of the object.

Answer 1

Total distance will be=18+18=36m
Total time=4+2=6sec
S=D/T
S=36/6
S=6m/s

Answer 2

$avg. \: speed \: = \frac{total \: distance}{total \: time} \\ avg. \: speed \: = \frac{18 + 18}{4 + 2} = \frac{36}{6} \frac{m}{s}$
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