Subject
Bank Exam
Topic
Bangladesh Bank (AD) - 12.11.2021
If machine A polishes x units in 12 minutes and machine B polishes 5x units in 40 minutes, in how many minutes will A and B, working together, polish 50x units?
If machine A polishes x units in 12 minutes and machine B polishes 5x units in 40 minutes, in how many minutes will A and B, working together, polish 50x units?
ক)
240খ)
300গ)
350ঘ)
120Explanation
Machine A ,1 মিনিটে পালিশ করে x/12 একক Machine B ,1 " " " 5x/40 " অতএব ,একত্রে 1 মিনিটে পালিশ করে x/12 +5x/40 =(10x+15x)/120 =25x/120 =5x/24 একত্রে 5x/24 একক করে ১ মিনিটে " 1 " " (1× 24)/5x " 50x " ' (1× 24 × 50x )/5x " =240 মিনিটেRelated questions
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