Related Questions

One copy machine can make 20 copies a minute, and a second copy machine makes 15 copies a minute. If the two copies work together, how long would it take them to make 2100 copies?
A 60 minutes
B 105 minutes
C 122 minutes
D 140 minutes
It costs Tk. 1000 to make the first thousand copies of a book and x taka to make each additional copies. If a total of 6000 copies were made with a total cost of Tk. 5500, what is X?
A 1
B .9
C .8
D .75
At a photocopy center , the first 10 copies cost x taka each. Each of the next 50 copies costs 2 taka less per copy . From the 61 st copy on, the cost 1 Taka per copy, In terms of x how much does it cost in. Taka to have 200 copies made/
A 10x+240
B 50x-10
C 50(x-5)
D 60x+140
One copy machine can make 20 copies a minute , and a second copy machine makes 15 copies a minute. If the two copiers work together, how long would it take them to make 2100 copies?
A 60 minutes
B 105 minutes
C 122 minutes
D 140 minutes
Which of the following SQL statements are helpful in database redesign?
A Correlated subqueries only
B EXISTS/NOT EXISTS expressions only
C Both of the above are helpful
D None of the above are helpful
If a photocopier makes 2 copies in 1/3 second, at the same rate how many copies does it make in 4 minutes?
A 1440
B 480
C 576
D 720
It costs X taka each to make the first thousand copies of a CD and Y taka to make each subsequent copy. How many taka will it cost to make Z copies (Z is greater than 1000) of the CD?
A 1000X +YZ
B 1000(Z-X) + XY
C 1000 (Z-Y) +XZ
D 1000(X-Y) +YZ
An author received Taka 0.80 in royalties for each of the first 100,000 copies of his book sold, and Taka 0.60 in royalties for each additional copy sold. If he received a total of Taka 260,000 in royalties, how many copies of his book were sold?
A 230,000
B 350,000
C 380,000
D 400,000
If a copier makes 3 copies every 4 seconds, then continues at this rate, how many minutes will it take to make, 9,000 copies?
A 60
B 100
C 200
D 3,000
If a copier makes 3 copies every 4 seconds then continues at this rate, how many minutes will it take to make 9,000 copies-
A 60
B 100
C 200
D 3000

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