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The Area of a Trapezium is 91 Cm2 and Its Height is 7 Cm. If One of the Parallel Sides is Longer than the Other by 8 Cm, Find the Two Parallel Sides. - Mathematics

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ConceptArea of Trapezium

Question

The area of a trapezium is 91 cm2 and its height is 7 cm. If one of the parallel sides is longer than the other by 8 cm, find the two parallel sides.

Solution

Let the depth of canal bed.
Given:
Lengths of the parallel sides of the trapezium shape canal are 10 m and 6 m.
\And, the area of the cross section of the canal is 72 m2.
Area of trapezium \[=\frac{1}{2}\times(\text{ Sum of the parallel sides })\times(\text{ Perpendicular distance between the parallel sides })\]
\[72 = \frac{1}{2} \times (10+6)\times (d)\]
\[72 = 8\times d\]
\[d =\frac{72}{8}= 9 m\]

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APPEARS IN

 RD Sharma Solution for Mathematics for Class 8 by R D Sharma (2019-2020 Session) (2017 to Current)
Chapter 20: Mensuration - I (Area of a Trapezium and a Polygon)
Ex. 20.2 | Q: 12 | Page no. 23

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Solution The Area of a Trapezium is 91 Cm2 and Its Height is 7 Cm. If One of the Parallel Sides is Longer than the Other by 8 Cm, Find the Two Parallel Sides. Concept: Area of Trapezium.
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