Question

If an automobile battery is rated at 20 ampere-hours, what is the maximum current that can be supplied for 19 minutes?

Answer 1

20Ah is the number of charge that can be supplied at 20A for 1 hour. If you wish to drain it in 19 minutes, then the current is:
$20*60 = A_{2}*19$
$A_{2}=63.2A$