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একটি কাজ ক একা ১৫ দিনে এবং খ একা ১০ দিনে শেষ করতে পারে, ক ও খ একত্রে কত দিনে ঐ কাজ কত দিনে শেষ করতে পারবে? ( ন্যাশনাল এগ্রিকালচারাল টেকনোলজি প্রোগ্রাম ;১৯)

Admin

26 Jan, 2023

ক) ৫ দিনে

খ) ৬ দিনে

গ) ৮ দিনে

ঘ) ১০ দিনে

উত্তরঃ খ

ব্যাখা,

Shortcut : ১৫×১০/১৫+১০=৬ দিন

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