Working alone, pump A can empty a pool in 3 hours. Working alone, pump B can empty the same pool in 2 hours. Working together, how many minutes will it take pump A and pump B to empty the pool?
Solution
Correct Answer: Option A
A ও B একত্রে পুকুরটি খালি করতে পারে
=(3×2)/(3+2) ঘন্টা
=6/5 ঘন্টায়
(6/5)×60 মিনিটে
=72 মিনিটে ।
=(3×2)/(3+2) ঘন্টা
=6/5 ঘন্টায়
(6/5)×60 মিনিটে
=72 মিনিটে ।
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