allery30 മീറ്റർ 20 മീറ്റർ പൂന്തോട്ടത്തിന് ചുറ്റുമുള്ള ഒരു ഏകീകൃത പുറം പാത 216 m² ഉൾക്കൊള്ളുന്നു; അതിൻ്റെ വീതി?
A3 m
B1 m
C4 m
D2 m
Answer & Solution
Correct answer: D. 2 m
വീതി x ന്, (30 + 2x) (20 + 2x) - 600 = 216 നൽകുന്നു (x - 2) (x + 27) = 0, അതിനാൽ x = 2 മീ.
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