Answers

2015-08-26T22:29:49+08:00
20 m/s to 30 m/s in 1 sec
if 5 sec then 
30 + 15 in 2 sec
22.5 + 45 in 3 sec
37.25 + 45 + 22.5 in 4 sec
59.75 + 45 =  104.75
104.75 + 42.375 in 5 sec
147.125 :)

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