The 'queen mary' used to sail across the atlantic ocean the ships usual speed was 33 miles per hour. on average, the ship used fuel at the rate of 1 gallon for every 13 feet sailed. calculate how many gallons of fuel the ship used in one hour of travelling at usual speed. there is 5280 feet in one mile.

It is pi over 6:

We first solve this by determining how many times it goes around the circle. When you turn 25pi/6 into a mixed number you get 4pi + 1pi/6. Since it takes 2pi to get around the circle once, you go around the circle twice with 4pi. This leaves with 1pi/6 left at the starting point. The answer is pi/6. 13pi/6 also has the same terminal angle but it is not in range of answers (they are asking for 0-2pi)