Constant speed of the train is 72 km/hr. Calculate its speed in m/sec?
(a) 20 ms ‐¹
(b) 15 ms -¹
(c) 9 ms -¹
(d) 18 ms-¹
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Answer:
20 m/sec.
Explanation:
72×5÷18
4×5=20m/sec
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