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SSC Selection Post 2024 PYQ — Question 60

SSC Selection Post - Matriculation Level - 20 June 2024 - Shift 1 • Quantitative Aptitude • Q60

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If the length of each of the two equal sides of an isosceles triangle is 15 cm and the adjacent angle is 30°, then the area of the triangle is:

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Correct answer: C

Explanation

The correct answer is Option 3 i.e. 56.25 cm2.

Area = 121\over2 ab sinC

here, a = b = 15 cm, and C = 30°

Area = 121\over2 × 15 × 15 × sin30°

⇒ 121\over2 × 15 × 15 × 121\over2 = 2254225\over4 = 56.25 cm2