alleryএকটি পূর্ণ সিলিন্ডার (r=6,h=8 সেমি) একই r,h এর একটি কঠিন শঙ্কু ধারণ করে। একটি সিলিন্ডারে এর জল ঢালুন r=4 সেমি। নতুন গভীরতা?
A12 cm
B8 cm
C6 cm
D18 cm
Answer & Solution
Correct answer: A. 12 cm
জলের পরিমাণ হল π×6²×8 −
(1/3)π×6²×8 = 192π সেমি ³;
বেস ক্ষেত্রফল দ্বারা ভাগ করলে 16π গভীরতা দেয় 12 cm।
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