একটি পাত্রে এক-চতুর্থাংশ জল আছে। এতে আরও 10 কাপ জল যোগ করার পর পাত্রটি তিন-চতুর্থাংশ পূর্ণ হয়। পাত্রটির ধারণক্ষমতা কাপে নির্ণয় করুন।

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RRB Group D 30 Aug 2022 Shift 3 Official Paper
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  1. 22
  2. 25
  3. 20
  4. 27

Answer (Detailed Solution Below)

Option 3 : 20
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গণনা:

ধরা যাক, পাত্রে থাকা জলের পরিমাণ = 1/4 x

যেখানে x হল পাত্রে থাকা মোট জলের পরিমাণ

10 কাপ জল যোগ করার পর আয়তন হয় = 3/4x

10 কাপ সমান = 3/4x - 1/4x = 2/4x

সুতরাং x = 10\(\times\)4/2 = 20 কাপ

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