Basic Maths Data Intensity 4 :: Discussion


20.To fill a cistern, pipes P, Q & R take 20, 15 & 12 minutes respectively. The time in minutes that the three pipes together will take to fill the cistern is ?
A.5 min
B.10 min
C.15 min
D.20 min
Answer:  Option  A
Explanation:

Tutorial Link:
Published by:Michael Daani

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