A sports competition will be held on this Sunday. Some
competitions start at the following times:
8:00 am, 8:50 am, am, 10:30 am, 11:20 am
in the blank with the time pattern.
has two competitions at 8:50 am and 10:30 am. If he finishes the first
competition at 9:40 am, how much time does he have before his second
the interval between the competitions? min