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A trapezium PQRS inscribes a circle whic...

A trapezium PQRS inscribes a circle which touches the circle at M, A, N, B, Radius of circle is 10 cm. The length of each non-parallel side is 21 cm. What is the perimeter of trapezium?

A

82 cm

B

84 cm

C

85.5 cm

D

can't be determined

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The correct Answer is:
B
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