allery21 cm ദൂരമുള്ള ഒരു വൃത്താകൃതിയിലുള്ള സെക്ടറിന് ചുറ്റളവ് 86 cm ഉണ്ട്. അതിൻ്റെ പ്രദേശം കണ്ടെത്തുക; π = 22/7 ഉപയോഗിക്കുക.
A462 cm²
B231 cm²
C693 cm²
D924 cm²
Answer & Solution
Correct answer: A. 462 cm²
ആർക്ക് 86−2×21 = 44 സെൻ്റീമീറ്റർ ആണ്, ആംഗിൾ 44/132×360° =120°;
ഏരിയ 120/360×(22/7)×21² =462 cm²
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