23 hours 50 minutes and 7 seconds is how many seconds?

Question

How many seconds are there in 23 hours 50 minutes and 7 seconds

Answer 1

(23 hours)*(3600 sec/hr)+(50 min)*(60 sec/min) + 7 sec = 85807 sec

Answer 2

Hi Margaret;

23 hours 50 minutes and 7 seconds

 

[(23 hours)(3600 seconds/hour)]+[(50 minutes)(60 seconds/minute)]+[7 seconds]

 

Let's cancel units where appropriate...

In the first bracketed equation, the unit of hour appears in the numerator and denominator...

[(23 hours)(3600 seconds/hour)]+[(50 minutes)(60 seconds/minute)]+[7 seconds]

[(23)(3600 seconds)]+[(50 minutes)(60 seconds/minute)]+[7 seconds]

In the second bracketed equation, the unit of minutes appears in the numerator and denominator...

[(23)(3600 seconds)]+[(50 minutes)(60 seconds/minute)]+[7 seconds]

[(23)(3600 seconds)]+[(50)(60 seconds)]+[7 seconds]

We have only the unit of seconds.  This is all we want.

 

Canceling units is always your first priority.  If these do not align, you have the wrong equation.  Then you execute calculations.

(82800 seconds)+(3000 seconds)+(7 seconds)= 85807seconds