2 cm/sec কে km/hr-এ রূপান্তর করলে হবে-
A. 20 km/hr
B. 7.2 km/hr
C. 10.5 km/hr
D. 5.5 km/hr
সঠিক উত্তরঃ
C.
10.5 km/hr
Explanation:
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