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S can do a piece of work in 80 days and ...

S can do a piece of work in 80 days and T in 60 days. With the help of U, they finish the work in 20 days. In how many days U alone can do the same work?

A

40

B

60

C

48

D

80

Text Solution

Verified by Experts

The correct Answer is:
D
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