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Bunuel
Printer A and Printer B can each print 1⁄4 page per second. How long will it take both printers working together to print 100 pages?

A. 25 seconds
B. 50 seconds
C. 100 seconds
D. 200 seconds
E. 400 seconds

Ans. \(100/(1/4 + 1/4) = 200\)
Hence (D)
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Bunuel
Printer A and Printer B can each print 1⁄4 page per second. How long will it take both printers working together to print 100 pages?

A. 25 seconds
B. 50 seconds
C. 100 seconds
D. 200 seconds
E. 400 seconds

1/4 page can be completed in 1 sec.
1 page can be completed in 4 sec.
So both can complete 1 page in 2 seconds.
100 pages can be completed in 200 seconds.
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Each printer prints 0.25page in a sec.
Thus both printers together print 0.5 page /sec which implies 1page/2sec.

Thus 100 pages will take 100*2=200 seconds.

Option D

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Automated notice from GMAT Club BumpBot:

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