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A and B have to type a book together con...

A and B have to type a book together containing 120 pages. A takes 9 hrs to type 36 pages B takes 5 hrs to type 40 pages. A typed first 60 pages alone and the last 60 pages were typed by A and B together. How much time (in hours) will be taken to type the complete book?

A

24

B

20

C

12

D

15

Text Solution

Verified by Experts

The correct Answer is:
B
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