Mister Goodmath: Problem of the week

The Challenge:

The following problem was submitted by Mr. John Pierce who works for Coastal FuelsMarketing, Incorporated. Coastal Fuels supplies fuel to many of the cruise ships that berth at Port Everglades and planes that fly from Ft. Lauderdale International Airport. The company pumps fuel directly to those locations from hugh storage tanks located at the port. Mister Goodmath sends a big thanks to John, for the submission.
 
 

To fuel a ship, Coastal fuels pumps oil from their hugh fuel tanks directly to the ships. The Sun Princess takes 240 minutes, the Westerdam takes 450 minutes and the Sea Escape takes 90 minutes to complete the fueling process. How many hours does it take to fuel all three of these ships?

The Solution:

Should you decide to ponder the problem and accept the challenge, communicate your solution to Mister Goodmath at "rooneym@mistergoodmath.org". Great solutions will be featured on T.V. during WAVE morning announcements.
 

The Hint:
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