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A speed of 22.5 m/sec. is the same as?

40.5 km/hr.
81 km/hr.
36.8 km/hr .
72 km/hr.

Correct Answer: 81 km/hr.

Explanation:

Speed in km/hr = speed in m/sec x (18 / 5 )
Speed in km/hr = (22.5 x 18 /5 ) km/hr
= 81 km/hr.

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