alleryএটা সম্পূৰ্ণ চিলিণ্ডাৰত (r=6,h=8 cm) একে r,h ৰ এটা কঠিন শঙ্কু থাকে। ইয়াৰ পানী r=4 চে.মি. নতুন গভীৰতা?
A12 cm
B8 cm
C6 cm
D18 cm
Answer & Solution
Correct answer: A. 12 cm
পানীৰ আয়তন π×6²×8 − (1/3)π×6²×8 = 192π cm³
ভিত্তি ক্ষেত্ৰফল 16π ৰে ভাগ কৰিলে গভীৰতা 12 চে.মি.
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