Subject
Quantitative Aptitude
Topic
Time and Work
A is 30% more efficient than B.How much time will they,working together ,take to complete a job which A alone could have done in 23 days?
A is 30% more efficient than B.How much time will they,working together ,take to complete a job which A alone could have done in 23 days?
ক)
11 daysখ)
13 daysগ)
20(3/17) daysঘ)
none of theseExplanation
(A,B এর চেয়ে ৩০% বেশি দক্ষ ।A একা কাজটি ২৩ দিনে করতে পারে তারা একত্রে কাজটি কতক্ষণে করতে পারবে?) যেহেতু B এর তুলনায় A এর দক্ষতা ৩০% বেশি সেহেতু একই সময়ে A এর সম্পাদিত কাজঃB এর সম্পাদিত কাজ =১৩০ঃ১০০=১৩ঃ১০ একই পরিমান কাজ সম্পাদনে , A এর সময়ঃ B এর সময়=১০ঃ১৩ বা,২৩ঃ B এর সময়=১০ঃ১৩ বা, B এর সময়/২৩ =১৩/১০ বা,B এর সময় =(১৩/১০)×২৩=২৯৯/১০ দিন অতএব B কাজটি ২৯৯/১০ দিনে একা সম্পন্ন করতে পারে। A এর ১ দিনের সম্পন্ন কাজ =১/২৩ অংশ B এর ১ দিনের সম্পন্ন কাজ =১০/২৯৯ অংশ (A+B) এর ১ দিনের সম্পাদিত কাজ =(১/২৩) +(১০/২৯৯) অংশ =২৩/২৯৯ =১/১৩ অংশ অতএব A এবং B একত্রে কাজ সম্পূর্ণ করতে পারে =১৩ দিনেRelated questions
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