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A supertanker leaves port traveling north at an average speed of 10 knots
A supertanker leaves port traveling north at an average speed of 10 knots. Two hours later a cruise ship leaves the same port, heading south at an average speed of 18 knots. How many hours after the cruise ship sails will the two ships be 209 nautical miles apart? (1...
Find two numbers whose product is 3 and the difference
Find two numbers whose product is 3 and the difference of whose reciprocals is 1/6.
A tank can be filled by one pipe in 12 hours
A tank can be filled by one pipe in 12 hours, by a second pipe in 7 hours, and by a third pipe in 4 hours. If all three pipes are open, how long will it take to fill the tank?
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