Max fills up water balloons for 30 minutes at a rate of 2 water balloons every minute. Max’s friend Zach fills up water balloons for 40 minutes at a rate of 3 water balloons every minute. In the process, 10 of the water balloons pop on the ground. How many filled water balloons do Max and Zach have in total?
Max fills 30 * 2 = <<30*2=60>>60 water balloons
Zach fills 40 * 3 = <<40*3=120>>120 water balloons
Max and Zach have a total of 60 + 120 - 10 = <<60+120-10=170>>170 water balloons
#### 170