Answer :
5 minutes
100 sit-ups in 2 minutes means 50 sit-ups per minute
amount of sit-ups / mins
100 / 2
200. /. 4
300. /. 6
100 sit-ups in 2 minutes means 50 sit-ups per minute
amount of sit-ups / mins
100 / 2
200. /. 4
300. /. 6