Question : P, Q, and R can complete a piece of work in 10 days, 15 days, and 20 days, respectively. If they work together, in how many days can they finish the same work?
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution :
P, Q and R can complete a task in 10 days, 15 days and 20 days, respectively.
P's work in 1 day =
Q's work in 1 day =
R's work in 1 day =
Work done by P, Q, and R together in 1 day =
So, P, Q, and R can complete the whole task in
Hence, the correct answer is
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