$1.40 pays for 30 minutes of parking. How long can you park for with $2.80?

$1.40 pays for 30 minutes of parking. How long can you park for with $2.80?

Immediately, I see that $2.80 is $1.40 * 2

Which means, if $1.40 pays for 30 minutes of parking
$1.40 * 2 = $2.80 means $2.80 pays for 30 minutes * 2 = 60 minutes or 1 hour

Double the rate means double the time you can park