The parallel sides fo a trapezium are 30...

The parallel sides fo a trapezium are 30 cm and 20 cm and its non-parallel sides are both equal. If the area fo the trapezium is `300 cm^(2)`, then what is the length (in cm) of eac non-parallel side?

A

10

B

15

C

12

D

13

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The correct Answer is:

D

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