Donald swims 3 lengths of a swimming pool in 93 seconds. Use this information to show that he could swim 100 lengths in under 55 minutes

Answer to this is long and verbal - see below. Short answer is "yes, he can make it"

Step-by-step explanation:

We need to average his time per length (assuming he never gets tired!)

93/3 = 31 secs per length

Now figure 100 lengths using this average

100 x 31 sec - 3100 secs

Convert secs to minutes.

3100 / 60 secs per minute = 51.66 mins needed to complete.

This is under 55 minutes, so we assume he can make it!