math

You have a box which contains only red marbles and blue marbles. The mass of one red marble is 16 grams, while the mass of one blue marble is 20 grams. If the box contains 21 red marbles and 18 blue marbles, what is the total mass of the marbles in the box?

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asked by Abdul
  1. that would be 21*16 + 18*20 = 696g

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    posted by Steve
  2. the mass of one red marble is 16g and you have 21 red marbles, therefore
    16.21=336grams
    And you have 18 blue marbles and the mass of one blue marble is 20 grams
    therefore, 20.18=360g
    336g+360g=696grams total in the box..
    I hope my answer is correct.

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    posted by Sean

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