SOLUTION: A student can finish a project 15 minutes earlier than the other student. How long will it take them to finish the project together?

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Question 1143132: A student can finish a project 15 minutes earlier than the other student. How long will it take them to finish the project together?
Found 3 solutions by josgarithmetic, ikleyn, Alan3354:
Answer by josgarithmetic(39630)   (Show Source):
You can put this solution on YOUR website!
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A student can finish a project 15 minutes earlier than the other student. How long will it take them to finish the project together?
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A student can do a project in 15 minutes less than another student. How long would the project take if they work together?
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, their combined rate; but how long does either student need to do the project alone?

Answer by ikleyn(52921)   (Show Source):
You can put this solution on YOUR website!
.

            The problem, presented in the post, is INCOMPLETE.

            In the form it is presented, it CAN NOT be solved.

If you want to see many other similar solved problems (which you can consider as your TEMPLATES), look into the lesson
    - Using quadratic equations to solve word problems on joint work
in this site.

For introductory lessons on joint work see the lessons
    - Using Fractions to solve word problems on joint work
    - Solving more complicated word problems on joint work
    - Selected joint-work word problems from the archive

Read them and get be trained in solving joint-work problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this textbook under the topic
"Rate of work and joint work problems" of the section "Word problems".

Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.

Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website!
A student can finish a project 15 minutes earlier than the other student. How long will it take them to finish the project together?
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You can find a "literal solution" using t or x as the time the faster student took.
But, it's not spec'd that they started at the same time, so that's meaningless.
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If it said: "A student can finish a project in 15 minutes less than the other student ..." that would at least make sense.
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Then, "How long will it take ..."
It will take zero (0), since they're already finished it.
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Too much gibberish.