The base of a triangle is 15 cm and height is 12 cm. Find the height of another triangle of double the area whose base is 20 cm.
A18 cm
B20 cm
C24 cm
D30 cm
Explanation
Area of first triangle = 0.5 * 15 * 12 = 90 cm². Area of second triangle = 2 * 90 = 180 cm². For second triangle: 0.5 * 20 * h = 180 => 10h = 180 => h = 18 cm.
Exam Relevance
- Topic: Geometry & Mensuration
- Subtopic: Triangles
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