মাদকদ্রব্য নিয়ন্ত্রণ অধিদপ্তর || সহকারী প্রসিকিউটর (26-12-2020) || 2020
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Created:
2 months ago
|
Updated:
4 days ago
১ম ও ২য় নল দ্বারা ১ মিনিটে পূর্ণ হয় অংশ।
আবার, ৩য় নল দ্বারা ১ মিনিটে খালি হয় অংশ।
এই নল তিনটি একত্রে খুলে দিলে,
১ মিনিটে পূর্ণ হবে অংশ।
অর্থাৎ, নল তিনটি একসাথে খুলে দিলে অংশ পূর্ণ হয় ১ মিনিটে
∴ ১ বা সম্পূর্ণ অংশ পূর্ণ হয় = ১৫ মিনিটে।
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