A machine P can paint one lakh books in 8 hours; machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines started operating at 9 A. M. while machine P is stopped at 11 A. M. and the reamaining two machines completed the work. Approximately at what time will the work (to print one lakh books) be finished?
Created: 6 years ago |
Updated: 3 years ago
best des
P,Q এবং R 1 ঘণ্টায় করে অংশ
= "
P,Q এবং R 2 " " অংশ
অবশিষ্ট থাকে অংশ
(Q + R) একত্রে 1 ঘণ্টায় করে অংশ
Q এবং R একত্রে অংশ কাজ করে 1 ঘণ্টায়
Q এবং R " " " " ঘণ্টায়
সুতরাং কাজটি 11 টার পর প্রায় 2 ঘণ্টা পরে অর্থাৎ 1 টায় শেষ হয়।
Md Azizur Rahman
Founder of Satt
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