a certain form letter is to be sent to prospective customers. If 4 model-X computers working independently can do a combined total of 4 of the letters in 4 minutes, then 100 model-X computers working indenpendly can do a combined total of 100 of the letters in exactly how many minutes?
A. 4 min
B. 10 min
C. 25 min
D. 40 min
E.100min
which one is correct, please tell me the method also. how do I set this proportion?
2007-01-12 01:02:21 · 7 answers · asked by liangjizong22 1 in Science & Mathematics ➔ Mathematics
Set up the working proportion:
4 letters/ 4 workers/ 4 minutes = 100 letters/ 100 workers/ X minutes
Solve for X.
4/4/4 = 100/100/X
(4/4)/4 = (100/100)/X
1/4 = 1/X
X=4
Done!
2007-01-12 01:24:33 · answer #1 · answered by Jerry P 6 · 0⤊ 0⤋
4 computers can do 4 letters in 4 minutes.
100 computers can do 100 letters at the same rate ie 4 minutes
A. 4 min
2007-01-12 01:06:21 · answer #2 · answered by Tom :: Athier than Thou 6 · 0⤊ 0⤋
4 letters in 4 mins.. for 4 computers
100 letters in 4 mins.. for 100 computers
as each computer takes 4 mins to finish one letter
hence 100 computers can finish 100 letters in 4 mins
2007-01-12 01:08:10 · answer #3 · answered by phalo 1 · 0⤊ 0⤋
One of them is correct.
4 models - 4 letters - in 4 minutes
100 models - 100 letters - t minutes?
Model1*time1/letters1=Model2*time2/letters2
4*4/4=100*t2/100
16/4=t2
t2=4
4 minutes
the correct answer is A.
2007-01-12 01:04:58 · answer #4 · answered by Salih D 1 · 0⤊ 1⤋
A. 4 MIN
2007-01-12 01:43:06 · answer #5 · answered by flori n 2 · 0⤊ 0⤋
E.100min
2007-01-12 01:11:35 · answer #6 · answered by lithawana6 1 · 0⤊ 2⤋
sorry i m also very weak in maths....
2007-01-12 01:11:52 · answer #7 · answered by laiba_redroses 2 · 0⤊ 2⤋