12.Ravi and Kumar are working on an assignment. Ravi takes 6 hours to type 32 pages on a computer, while Kumar takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?
A. 7 hours 30 minutes
B. 8 hours
C. 8 hours 15 minutes
D. 8 hours 25 minutes
Answer:
Option : C
Number of pages typed by Ravi in 1 hour =
|
32
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=
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16
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6
|
3
|
Number of pages typed by Kumar in 1 hour =
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40
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= 8
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5
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Number of pages typed by both in 1 hour =
|
|
16
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+ 8
|
|
=
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40
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3
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3
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∴ Time taken by both to type 110 pages =
|
|
110 x
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3
|
|
hours
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40
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= 8
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1
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hours (or) 8 hours 15 minutes.
|
|
|
