The time it takes to do 90 sit-ups can vary based on an individual's fitness level and pace. On average, it might take anywhere from 5 to 10 minutes, depending on how quickly one performs each sit-up and whether they take breaks. For those who are more conditioned, it could be done faster, while beginners may need more time. Consistency and form are key to completing them effectively.
120/90 = 1hour 20minutes , with no wind .
90 seconds
56
45 hours.
2 hours 15 minutes
A long time. Generally you should be doing situps "until failure."
Just under 15 minutes.
He didn't do situps, silly!
90 days
90 days.
the prediction is about 90 ears
It is: 153/90 = 1.7 hours
90 minutes
60 to 90 days
It would depend on your speed
Depends on the speed
It takes at most 90 minutes