Question

If James can swim 10 laps in 23 mins. what would be his expected time for 15 laps?

Answer 1

34.5
because 23 / 10 =2.3 and 2.3*15=34.5

Answer 2

if he can swim 10 laps in 23 mins so how long he can swim the 15 laps?
you can say:
10/23 = 15/?
so ? is the answer:
15*23/10 = 34.5 mins :)))
i hope this is helpful
have a nice day