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प्रश्न
The area of a trapezium is 34 cm2 and the length of one of the parallel sides is 10 cm and its height is 4 cm. Find the length of the other parallel side.
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उत्तर
Area of trapezium = 34 cm2
Let the length of the first parallel side = a
Length of second parallel side = b.
Given a = 10 cm
And height (h) = 4 cm
Area of trapezium =12(a + b) × h
34 = 12(10 + b) × 4
or 34 = 20 + 2b
or 34 − 20 = 2b
or 14 = 2b
or 7 = b
Hence, length of the second parallel side = 7 cm
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