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ICSE-VIII-Mathematics

20: Area of Trapezium and a Polygon Class 8 Maths

with Solutions -
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  • #6
    The base and the height of a triangle are in the ratio 5 : 3. If the area of the triangle is 67.5 m2; find its base and height.
    Ans : Let base = 5x m
    height = 3x m
    Area of ∆ = ½ × base × height
    ∴ ½ × 5x × 3x = 6.75
    ⇒ x2 = (67.5 × 2)/15
    ⇒ x2 = 4.5 × 2
    ⇒ x2 = 9.0
    ⇒ x = √9
    ⇒ x = 3
    base = 5x = 5× 3 = 15 m
    height = 3x = 3× 3 = 9 m