Question

Tiffany and Mansi set up a lemonade stand and sell cups of lemonade at a rate of 7 cups per hour. After 5 hours there are 89 cups left.
Find out how many cups the young entrepreneurs started with.
If they continue to sell at the same rate, how many cups will they have after 15 hours?

Answer 1

7 Cups x 5 Hours = 35 Cups sold
89 Cups + 35 = 124 Cups

They stared with: 124 Cups

7 Cups X 15 Hours = 105 Cups

124 - 105 = 19

19 Cups will be left after 15 Hours.