Mathematics · Mensuration
एक वृत्ताकार पाइप, जिसका आंतरिक व्यास 2 सेमी है, से 4 मीटर प्रति सेकंड की दर से पानी एक बेलनाकार टैंक में बहता है, जिसके आधार की त्रिज्या 80 सेमी है। 20 मिनट में पानी का स्तर कितना बढ़ जाएगा?
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