Algebra

posted by .

Three ships leave New York for France on the same day. The round trip takes the first ship 12 days, the second ship 16 days and the third ship 20 days. How many days will elapse before all three ships again leave New York on the same day? Assume continuous trip activities for all three ships.

  • Algebra -

    This is simply finding the Lowest Common Multiple of
    12, 16, and 20
    12 = 3x4
    16 = 4x4
    20 = 5x4
    LCM = 4x3x4x5 = 240

    240 days

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    Anita does laundry every other day. Every five days she changes sheets. Every 15 days she dusts. If she does all three chores today, how many days will it be before she does them all on the same day again?
  2. math

    A grocer gets food from three suppliers. They deliver every 5 days, 6 days and 7 days, respectively. All three came today. When will they all deliver on the same day again?
  3. math

    A grocer get food from three suppliers. They deliver every 5 days, 6 days, and 7 days, respectively. All three came today. When will they all deliver on the same day again?
  4. math

    of the following which is the closest approximation to the amount of time it takes to read a 487-page book at the rate of 25 pages a day ?
  5. chemistry

    The disintegration of a radioisotope, such as I-131 to Xe-131, is another example of a first-order reaction. It has a half-life of 8.0 days. I-131 -> Xe-131 + e If you start with 1.40 g I-131, how many grams of I-131 will be left …
  6. 8th Grade Math

    A ship leaves the East Coast for California. It is traveling at a constant speed of five knots and takes 200 days to reach California. The ship arrives in California at the exact time of day that it left the East Coast. How far did …
  7. math

    help: Two travelers start simultaneously in two cities A and B, and go to meet each other. The part of A walk 1 km on the first day , the second day 2 km , 3 km on the third day , and so on. The part of B walk 20 miles the first day, …
  8. reading

    30-day Money Back Guarantee Groom Co. electric shavers come with a 30-day money back guarantee. The only stipulation is that you use your new exclusively for 2 weeks to become accustomed with the product. If you are not satisfied, …
  9. Algebra 2

    Mario took a 17 day trip around the U.S. He visited Boston, Miami, Philadelphia and New York. In Boston he spent $200 per day, in Miami $225 per day, in Philadelphia $175 per day and in New York he spent $150 a day for a total of $3400. …
  10. math

    two cruise ships sail from NY to FL.ONE ship make the round trip in 8 days.the other ship make the round trip in 10 days.both ships sail from ny today.which is the fewest number of days before both ships will sail again from newyork …

More Similar Questions