Question

During a catered lunch, an average of 4 cups of tea are poured per minute. The lunch will last 2 hours. How many gallons of tea should the caterer bring if there are 16 cups in one gallon?

Answer 1

The answer is 30.

There are 16 cups in a gallon. And 120 minutes in 2 hours. So multiply
16 × 120 = 480
Then divide, 480 ÷ 120 = 30 and get 30 as your answer.

Answer 2

During a catered lunch, an average of 4 cups of tea are poured per minute

⇒ 1 min = 4 cups

Convert 2 hours to mins:

2 hours = 120 mins

Find the number of cups poured in 2 hours:

1 min = 4 cups

120 min = 4 x 120 = 480 cups

Find the quantity in gallon:

16 cups = 1 gallon

1 cup = 1 ÷ 16 = 1/16 gallon

480 cups = 1/16 x 480 = 30 gallons

Answer: 30 gallons