What decimal of an hour is a second ?  Choose the most appropriate option:
A) 0.0027  B) 0.00027  C) 0.027  D) 0.00072  E) None of them
Required decimal = 1/60x60 = 1/3600 = .00027   Answer is 0.00027.
<result>B</result>
What decimal of an hour is a second ?