allery30 मीटर गुणा 20 मीटर के बगीचे के चारों ओर एक समान बाहरी पथ 216 वर्ग मीटर को कवर करता है; इसकी चौड़ाई?
A3 m
B1 m
C4 m
D2 m
Answer & Solution
Correct answer: D. 2 m
चौड़ाई के लिए x, (30 + 2x)(20 + 2x) − 600 = 216 देता है (x − 2)(x + 27) = 0, इसलिए x = 2 मी.
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