answersLogoWhite

0


Best Answer

Convert 20 minutes into seconds (20 * 60). There are sixty seconds in a minute. This would make 1200 seconds. Then add the 45 seconds (1245). Convert 30 minutes (1/2 an hour) into seconds (30 * 60). Then subtract 1245 from 1800. This would leave 555 seconds or 9 minutes, 15 seconds. I hope this helps.

User Avatar

Wiki User

โˆ™ 2012-02-11 21:33:46
This answer is:
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
User Avatar
Study guides
๐Ÿ““
See all Study Guides
โœ๏ธ
Create a Study Guide

Add your answer:

Earn +20 pts
Q: How do you subtract 20 mins. 45 seconds from one half hour?
Write your answer...
Submit
Related questions

How many seconds are equal to 1 hour and 42 minutes?

1 hour = 60 minutes therefore 60 mins + 42 mins = 102 mins 102 mins x 60 seconds = 6120 seconds 6120 seconds


How many seconds are in 2 and a half mins?

150 seconds


What is 30 mins as a decimal?

30 mins is half an hour. A half as a decimal is .50


How many seconds are in 2 hour 4 mins?

7,440 seconds.


What fraction is 19 seconds of an hour?

There are 60 seconds in a min. and 60 mins. in an hour = 3600 seconds in an hour. 19 seconds is therefore 19/3600 of and hour.


How many seconds is there in a hour?

60 secs x 60 mins = 3600 seconds in an hour :D


How many seconds in an hour 30 minutes?

There are 60 seconds in a minuet and 60 minutes in an hour. Therefore one hour and 30 mins. is the same as 90 mins. 60*90= 5400 seconds.


How many mins are in half a min?

90 seconds


How many seconds in one hour and 17 mins?

77 × 60 = 4620 seconds


Is 1 in a half hour is 50 mins?

No.


How many minutes and seconds in 3 hour?

180 mins


How many seconds in 16 of anhour?

1/6 of an hour is 10 mins. This is 600 seconds.


How many hours does 1600 seconds equal?

1600 (seconds) / 60 (seconds /min) = 26 mins 40 seconds 26.67 mins = 60 (minutes/hour) = .44 hours


How many seconds are there in 1 hour and 25 mins?

1 hr and 25 minutes is 5100 seconds.


How many sec s in 5 and a half mins?

330 seconds.


How many mins aree in one and a half mintues?

90 seconds


How many minutes are there in 1 and a half of an hour?

90 mins


The number of eggs in a basket double every minute the basket is full in half an hour when was it half full?

29 mins, because at 30 mins it will have doubled the amount at 29 mins, making 29 mins halfway. it is NOT 30 mins!!


How far from Detroit MI to Battle Creek MI?

An Hour and a Half To an Hour and 45 Mins


How many hours if you do something half hour?

0.5 hours / 1/2 an hour / 30 mins


How many minutes in two and a half hours?

one hour is sixty mins half an hour is 30 so: 2x60+30=150 minutes


What is every half hour on the hour?

It means every hour, do something on the half of that hour. Eg. 1:30 > 1 hour later > 2:30, etc. So basically, once an hour, but shift it to the half hour (30 mins)


If A guy ran half a mile in two minutes and fifty -five seconds. How many seconds is that?

2x60 is 120, + 55 is 175 mins.


How long is 1000000000 seconds?

thats 1 billion seconds or 277,777 hours 46 mins 40 secs, or 11,574 days 1 hour 46 mins 40 secs or 31 years 259 days 1 hour 46 mins 40 secs


6 minutes and 40 seconds is what fraction of an hour?

60mins 40sec is 6.6667 mins. 6.667/60 is 10/90 or 1/9 of an hour.