How to convert 40 seconds to hours?
We know (by definition) that:
We can set up a proportion to solve for the number of hours.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 hour is equal to 90 times 40 seconds.
It can also be expressed as: 40 seconds is equal to hours.
An approximate numerical result would be: forty seconds is about zero point zero one hours, or alternatively, a hour is about zero times forty seconds.
 The precision is 15 significant digits (fourteen digits to the right of the decimal point).Results may contain small errors due to the use of floating point arithmetic.