B. 36√3 cm² / 36√3 cm²
ExplanationArea of an equilateral triangle is √3/4 × a² so √3/4 × 144 = 36√3 cm².
समबाहु त्रिभुज का क्षेत्रफल √3/4 × a² होता है इसलिए √3/4 × 144 = 36√3 cm²।
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