एक तार को 28 सेमी की त्रिज्या के वृत्त के आकार में मोड़ आ गया है यदि इस वर्ग के आकार में मोड़ा जाता है तो इस वर्ग का क्षेत्रफल कितना होगा
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Answer:
616 cm
Since area of square is A = a²
484 = a²
a = \sqrt{484}
484
a = 22 cm
Perimeter of the square = 4a
= 4 x 22 = 88 cm.
Perimeter of said circle would be P = 2πr
2πr = 88
πr = 88 / 2
(22/7)r = 44
r = (44 x 7) / 22
r = 2 x 7 = 14 cm
Area of circle = πr²
= (22/7) x 14 x 14
= 44 x 14
= 616 cm²
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