alleryएक 30 m बाय 20 m बागेचे कव्हर 216 m² भोवती एकसमान बाह्य मार्ग; त्याची रुंदी?
A3 m
B1 m
C4 m
D2 m
Answer & Solution
Correct answer: D. 2 m
रुंदी x साठी, (30 + 2x)(20 + 2x) − 600 = 216 देते (x − 2)(x + 27) = 0, तर x = 2 मी.
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