Wim held his breath for 135 seconds.
The time he held his breath can also be written as
`1 1/2\ text(minutes)` | `2 1/4\ text(minutes)` | `2 1/2\ text(minutes)` | `2 3/4\ text(minutes)` |
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Aussie Maths & Science Teachers: Save your time with SmarterEd
Wim held his breath for 135 seconds.
The time he held his breath can also be written as
`1 1/2\ text(minutes)` | `2 1/4\ text(minutes)` | `2 1/2\ text(minutes)` | `2 3/4\ text(minutes)` |
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`2 1/4\ text(minutes)`
`text(There are 60 seconds in 1 minute.)`
`=> 135\ text(seconds = 2 mins 15 seconds)`
`=>\ text(Wim held his breath for)\ 2 1/4\ text(minutes.)`
It took Will 145 minutes to travel to his grandmother's house.
The time he travelled is closest to
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`1 3/4\ text(hours)` |
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`2 1/4\ text(hours)` |
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`2 1/2\ text(hours)` |
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`2 3/4\ text(hours)` |
`2 1/2\ text(hours)`
`text(There are 60 minutes in 1 hour.)`
`=> 145\ text(minutes = 2 hours 25 minutes)`
`=>\ text(Closest to)\ 2 1/2\ text{hours (150 minutes)}`
How long is a quarter of an hour?
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`text(15 seconds)` |
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`text(25 seconds)` |
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`text(30 seconds)` |
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`text(25 minutes)` |
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`text(15 minutes)` |
`text(15 minutes)`
`text(1 hour is 60 minutes.)`
`=>\ text(One quarter of an hour)`
`=60 -: 4`
`= 15\ text(minutes)`
Shelly and Rhonda are the first two runners in a cross country relay team.
Shelly runs 1 lap of the course and passes a baton to Rhonda for the second lap.
Their results are in the table below.
How long after Shelly started, in seconds, did Rhonda finish her lap?
`text(seconds)` |
`text(470 seconds)`
`text(Total time)` | `= 4:28 + 3:22` |
`= 7\ text(minutes and)\ \ 50\ text(seconds)` | |
`=(7xx60) +50` | |
`=420 + 50` | |
`=470\ text(seconds)` |