Subject
Bank Exam
Topic
Trust Bank Ltd. - Management Trainee Officer - 2016
A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:
A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:
ক)
\(9\frac{1}{5}\) daysখ)
\(9\frac{2}{5}\) daysগ)
\(9\frac{3}{5}\) daysঘ)
10 daysঙ)
NoneExplanation
Solution: অনুবাদঃ A ও B একটি কাজ যথাক্রমে 16 ও 12 দিনে করতে পারে । C এর সাহায্য নিয়ে তারা ঐ কাজটি 4 দিনে করতে পারে । C একাকী ঐ কাজ কয়দিনে করতে পারে ? A 16 দিনে করে 1 টি কাজ A 1 দিনে করে 1/16 অংশ B 12 দিনে করে 1 টি কাজ B 1 দিনে করে 1/12 অংশ A ও B 1 দিনে করে = = 7/48 অংশ কাজ আবার, (A + B + C) 4 দিনে করে = 1 টি কাজ (A + B + C) 1 দিনে করে = 1/4 অংশ তাহলে C 1 দিনে করে কাজের = = অংশ এখন, অংশ কাজ করে = 1 দিনে C 1 বা সম্পূর্ণ অংশ কাজ করে = দিনে Shortcut: A, B, C এই তিনজনের একত্রে কাজ = সূত্রটিতে A = 16, B = 12, C = c এবং তিনজনের একত্রে কাজ = 4 বসিয়ে পাই 4 = C = দিনেRelated questions
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