Question:The parallel sides of a trapezium are in the ratio of 3 : 5 and the perpendicular distance between them is 12 cm. If the area of the trapezium is 384 sq. cm, them the smaller of the parallel sides is : 

A 16 cm 
B 24 cm 
C 32 cm 
D 40 cm 

+ Answer
B 

+ Explanation
Let the parallel sides be 3x cm and 5x cm.

Then,` 1/2 (3x + 5x) xx 12`

        `= 384 or x = 8.`

:. Smaller of parallel sides = 24 cm

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Irin Moni

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