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The sides of a triangular park are 200 m...

The sides of a triangular park are 200 m, 210 m and 290 m. The area of the park (in hectares) is:
किसी त्रिभुजाकार उद्यान की भुजाएँ 200 मी, 210 मी और 290 मी की हैं | इस उद्यान का क्षेत्रफल ( हेक्टेयर में ) है:

A

2.4

B

2.1

C

2.9

D

1.8

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