allery30 m by 20 m বাগিচাৰ চাৰিওফালে এটা একেধৰণৰ বাহিৰৰ পথে 216 m² আবৰি ৰাখে; ইয়াৰ প্ৰস্থ?
A3 m
B1 m
C4 m
D2 m
Answer & Solution
Correct answer: D. 2 m
প্ৰস্থ x ৰ বাবে (30 + 2x)(20 + 2x) − 600 = 216 দিয়া হয়
(x − 2)(x + 27) = 0, গতিকে x = 2 মি.
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