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Two pipes X and Y can fill a cistern in 24 minutes and 32 minutes respectively. If both the pipes are opened together, then after how much time (in minutes) should Y be closed so that the tank is full in 18 minutes ?

A10 m

B6 m

C8 m

D5 m

Answer:

C. 8 m

Read Explanation:

ആകെ ജോലി 96 എന്നെടുത്താൽ

X ന്റെ എഫിഷ്യൻസി = 4

Y യുടെ എഫിഷ്യൻസി = 3

X - 18 മിനുട്ട് ജോലി ചെയ്താൽ പൂർത്തിയാകുന്ന ജോലി = 18 x 4 = 72

ബാക്കിയുള്ള ജോലി 96 - 74 = 24

24 ജോലി ചെയ്യാൻ Y ക്ക് ആവശ്യമായ സമയം - 243\frac{24}{3} = 8 മിനുട്ട് 

8 മിനിറ്റ് ജോലി ചെയ്തതിന് ശേഷം Y അടയ്ക്കണം 


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