SSC CGL Tier-1 practice question
The length of each of the two equal sides of an isosceles triangle is 100 cm each and the length of its base is 56 cm. The area (in cm2) of the triangle is:
From a SSC CGL Tier-1 General Awareness practice set · General Awareness
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Correct answer: (B) 2688
Equal sides = 100 cm, base = 56 cm. The altitude from the apex bisects the base into two 28 cm halves. Altitude h = √(100² − 28²) = √(10000 − 784) = √9216 = 96 cm. Area = ½ × base × height = ½ × 56 × 96 = 2688 cm².
हिंदी में प्रश्न
एक समद्विबाहु त्रिभुज की दो बराबर भुजाओं में से प्रत्येक की लंबाई 100 सेमी है और उसके आधार की लंबाई 56 सेमी है। त्रिभुज का क्षेत्रफल (वर्ग सेमी में) क्या है?
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सही उत्तर: (B) 2688
बराबर भुजाएँ = 100 सेमी, आधार = 56 सेमी। शीर्ष से खींची गई ऊँचाई आधार को दो 28 सेमी के बराबर भागों में विभाजित करती है। ऊँचाई h = √(100² − 28²) = √(10000 − 784) = √9216 = 96 सेमी। क्षेत्रफल = ½ × आधार × ऊँचाई = ½ × 56 × 96 = 2688 वर्ग सेमी।
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