πΊππ£ππ:
π, π πππ π
π‘πππ 18, 15 πππ 10 πππ¦π πππ ππππ‘ππ£πππ¦
Solution:
As we know the efficiency is the inversely proportional to the time.
Thus, the efficiencies of P, Q and R = 1/18 : 1/15 : 1/10
LCM of 18, 15 and 10 = 90
= 90/18 : 90/15 : 90/10
= 5 : 6 : 9
Therefore, the correct answer is (c).
English
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90 Mins English English100 Questions100 Marks90 Mins English English40 Questions30 Marks25 Mins EnglishTwo pipes, P and Q, together can fill a tank in 5 hours. If pipe P alone can fill the tank in 10 hours, then how much time (in hours) will pipe Q alone take to fill the tank?
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