80% of the tickets sold at an amusement park were discount tickets. If the park sold 20 tickets in all, how many discount tickets did it sell?

It will be 70 meters Take away 20 from 150 continually. 150-20=130. 130-20=110 110-20=90 90-20=70 it took 4 minutes, as it takes 4 times to get to 70. Then add 15 to 10 continually. 10+15=25 25+15=40 40+15=55. 55+15=70. It shows clearly it takes 4 minutes again as it was calculated 4 times, therefor the answer is 70metres. Or 4 minutes in.