Adam and Brianna plan to install a new tile floor in a classroom. Adam works at a constant rate of 50 tiles per hour, and Brianna works at a constant rate of 55 tiles per hour. If the new floor consists of exactly 1400 tiles, how long will it take Adam and Brianna working together to complete the classroom floor?
A. 26 hrs. 44 mins.
B. 26 hrs. 40 mins.
C. 13 hrs. 20 mins.
D. 13 hrs. 18 mins.
E. 12 hrs. 45 mins.
The solution to this problem came so easy that I feel like I am making some mistake
Here is how I have solved it:
Combined Rate of A + B = 50 + 55 = 105
Total tiles = 1400
Time needed to finish 1400 tiles = 1400/105 = 13 hours and 35/105 minutes which simplifies to be 13 hours 20 minutes.
So option C.
Work Rate Problem - 2
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Your solution is perfect.saadishah wrote:Adam and Brianna plan to install a new tile floor in a classroom. Adam works at a constant rate of 50 tiles per hour, and Brianna works at a constant rate of 55 tiles per hour. If the new floor consists of exactly 1400 tiles, how long will it take Adam and Brianna working together to complete the classroom floor?
A. 26 hrs. 44 mins.
B. 26 hrs. 40 mins.
C. 13 hrs. 20 mins.
D. 13 hrs. 18 mins.
E. 12 hrs. 45 mins.
The solution to this problem came so easy that I feel like I am making some mistake
Here is how I have solved it:
Combined Rate of A + B = 50 + 55 = 105
Total tiles = 1400
Time needed to finish 1400 tiles = 1400/105 = 13 hours and 35/105 minutes which simplifies to be 13 hours 20 minutes.
So option C.
Answer: C
Cheers,
Brent
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Hi saadishah,
As you continue to study, you're going to find that many of the GMAT Quant questions that you face are actually fairly straight-forward. The "work" that you have to complete often takes just a minute (or less) and the rest of your time is spent reading, taking notes and deciding which approach will get you to the correct answer in the most efficient way. While 'word problems' will certainly take longer to read than other (less-wordy) Quant questions, that doesn't mean that they're necessarily going to be that difficult. So you should stay calm (regardless of how wordy the prompt is), take notes and do all of the work on the pad.
GMAT assassins aren't born, they're made,
Rich
As you continue to study, you're going to find that many of the GMAT Quant questions that you face are actually fairly straight-forward. The "work" that you have to complete often takes just a minute (or less) and the rest of your time is spent reading, taking notes and deciding which approach will get you to the correct answer in the most efficient way. While 'word problems' will certainly take longer to read than other (less-wordy) Quant questions, that doesn't mean that they're necessarily going to be that difficult. So you should stay calm (regardless of how wordy the prompt is), take notes and do all of the work on the pad.
GMAT assassins aren't born, they're made,
Rich
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Rule of thumb:
If you're working from a book, and a solution seems too easy to be right, there's a very good chance IT IS that easy and you're right.
If you're working from a CAT, and a solution seems too easy to be right, there's a very good chance IT IS NOT that easy and you're wrong.
This rule has saved me a lot of headache over the years ... but I still screw up anyway sometimes.
If you're working from a book, and a solution seems too easy to be right, there's a very good chance IT IS that easy and you're right.
If you're working from a CAT, and a solution seems too easy to be right, there's a very good chance IT IS NOT that easy and you're wrong.
This rule has saved me a lot of headache over the years ... but I still screw up anyway sometimes.