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 Class 7 Mathematics Length, Perimeter and Area: Length and its Operations

In a trapezium ABCD, AB is parallel to DC. BC is perpendicular to AB and DC. AB =14 cm and BC =5 cm. The area of the trapezium is 100#cm^2#. What is the length of DC?
A. 26cm
B. 6cm
C. 20cm
D. 19cm

 (3m 24s)
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