1.

The ratio of the length of the parallel sides of a trapezium is 3: 2. The shortest distance between them is 15 cm. If the area of the trapezium is 450 cm.2, the semi-sum of the length of the parallel sides is

A. 20 cm
B. 30 cm
C. 60 cm
D. 120 cm
Answer» C. 60 cm


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