What decimal of an hour is a second?

A 0.000126

B 0.0025

C 0.0256

D 0.00027

Correct Answer: Option D

1 hour =60 minute
and 1 minute = 60 seconds

So, 1 hr =60 x 60 sec =3600 sec
1 sec = 1/3600 =0.000277777...=0.00027