how many machines will be needed to complete a task in 15 days given that it takes 10 days for 6 machines to complete the same task?
We had to do this before, but have forgotten the procedure! Thanks in advance for any help!
2007-12-11 07:37:14 · 4 answers · asked by PETEPUMA 3 in Science & Mathematics ➔ Mathematics
thank for the help...but that is what we get also, but it doesn't make sense....how can 9 machine take more days to do the same work as less machines taking less days?
2007-12-11 07:48:46 · update #1
Thank you so much Jeff for taking the time to explain the steps!!! We sure do appreciate it.
2007-12-11 08:05:30 · update #2
First solve for one machine: If it takes 10 days for 6 machines then how long will it take for 1 machine? Answer: 60 days (1 machine will take 6 times longer than 6 machines. 6 x 10 = 60).
Next solve for the number of machines you have: If it takes 60 days for 1 machine then how many machines will it take to complete the task in 15 days? Answer: 4 machines (15 days is one fourth of 60 days so you need 4 times the number of machines. 4 x 1 = 4).
2007-12-11 07:59:06 · answer #1 · answered by Jeff D 7 · 1⤊ 0⤋
Here's a hint: If it takes 6 machines 10 days to do the task, how many days would it take just 1 machine to do it?
PS - The answer is not 9 machines. Why would it take 9 machines longer to complete the task than 6 machines?
2007-12-11 15:40:51 · answer #2 · answered by John S 1 · 3⤊ 0⤋
10 Days: 6 Machine
Divide that by 2 gives you
5 Days: 3 Machine
Mutiply By 3
15 Days : 9 Machine
Answer is 9 Machines.
2007-12-11 15:40:47 · answer #3 · answered by Anonymous · 0⤊ 2⤋
9
2007-12-11 15:45:34 · answer #4 · answered by Anonymous · 0⤊ 2⤋