270 minutes.
Thirty seconds is one half minute. Four minutes is the product of eight half minutes (8/2=4).
1 hour = 60 minutes → 4½ hours = 4.5 × 60 minutes = 270 minutes
1 and a half. There are one and a half minutes in one and a half minutes.
A bacteria splits in half after 20 minutes, so that after 20 minutes there are 2 bacteria, and after 40 minutes there are 4 bacteria. How many bacteria will there be after 2 hours?
There are exactly 4.5 minutes in 4 and a half minutes? Fascinating huh?
270
There are 60 minutes in an hour and since "half an hour" is half of an hour, it will contain 30 minutes. Simply divide 60 by 2 to get the answer.
There are 10,5 minutes or 10 minutes and 30 seconds in 10 and a half minutes.
There are 5 half hours in 150 minutes.
30 minutes.
720 minutes.
15 minutes. One hour is 60 minutes, so half (1/2) an hour would be 30 minutes, and a quarter (1/4) hour 15 minutes.
210 minutes
1,350 minutes.
150 minutes.
90 minutes.