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Current time:0:00Total duration:3:38

Video transcript

susan has 96 minutes to complete a test at school the test begins at 1:59 p.m. and susan has volleyball practice at 4:00 p.m. how much time will Susan have between the end of the test and the beginning of volleyball practice let's think about this a little bit so the test begins at 1:59 so it's a very it's a very strange time to begin a test but let's just go with that so let me draw a little time line here so let's say that this is 2 o'clock so this is 2 o'clock p.m. then we're going to have 3 p.m. 3 o'clock p.m. then we're going to have 4 o'clock p.m. 4 o'clock p.m. which is also when volleyball practice begins so this is volleyball practice is going to start then and then go on from 4 p.m. and then the test begins at 1:59 so let me continue the number line so this is this right over here is 1 p.m. 1 o'clock p.m. so the test is going to begin at 1:59 so one minute before 2 p.m. we know that there are 60 minutes in an hour so 159 is one minute before 2 p.m. so I'm not drawing it completely at scale but this right over here this right over there is 159 p.m. so we use 1 minute we use 1 minute to get to 2 p.m. and then let's see we have to get up to 96 minutes so then you get another 60 minutes to go to 3 p.m. so so far we've used a cumulative 61 so this is 1 minute this is how long the test has been going on since the beginning so 1 minute by 2 p.m. 61 minutes by 3 p.m. if we go all the way to 4 p.m. that's going to be another 60 that'll be 121 minutes which is longer than the actual test so we know that the entire test is 96 minutes so we're going to get to some point right over here some point like this that's 96 minutes and what we need to figure out is is what is left over what is this distance right over here or what is this time this difference in time right over here and so to figure that out we need to figure out the time at which 96 minutes have passed since the beginning of the exam so at 3 o'clock 61 minutes have passed and so if we if we say well how many more minutes have to go on before the end of the test it's going to be 96 minus 61 so this the amount of time that elapses past 3 minutes is 96 minus 61 which is 35 minutes so this right over here this right over here is going to be is going to be 3 35 and so now our question is how much time is there between 3 35 and 4 p.m. well once again 60 minutes in an hour 4 p.m. is essentially the 60th minute so if we take 60 minus 35 60 minus 35 we get 225 so she is 25 she has a total of 25 minutes remaining after the test before she guess has to get to volleyball practice just as a review one minute between 159 and 2 then another 60 that guess this is 61 total minutes then another 35 minutes gets us to 96 minutes have passed and that also gets us to 335 which means we have 25 minutes until 4:00