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Need help with simple math problem. (lemmy.ml)

submitted 4 months ago by Donatello@lemmy.ml to c/math@lemmy.ml

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Hi,

I found online a nice (and seemed easy) math problem.

Rocket A travel from Mars to Earth in 200 days
Rocket B travel from Earth to Mars in 150 days, but take off 30 days later

When they cross each other, which one is the closet to the earth ?

So they give a "flat" answer, without giving any explanation on how they reach this conclusion.

What would be your simplest Mathematical solution for this ?

Thanks.

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[–] DerisionConsulting@lemmy.ca 1 points 4 months ago* (last edited 4 months ago) (1 children)

(Edit: late at night, math brain no work)

[–] meant2live218@lemmy.world 1 points 4 months ago (1 children)

Not a bad approach, but 100/150 is 0.6666, not 0.75.

[–] DerisionConsulting@lemmy.ca 1 points 4 months ago

Bah, too late at night. Thanks for the correction!