Question 683928
20/8 = 0.5/x


20x = 8*0.5


20x = 4


x = 4/20


x = 1/5


x = 0.2


So it will take 0.2 minutes or 0.2*60 = 12 seconds.


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Alternative way to do this



d = rt


20 = r*8


20/8 = r


2.5 = r


r = 2.5 


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d = rt


0.5 = 2.5*t


0.5/2.5 = t


0.2 = t


t = 0.2


So we get the same answer.