1.

 A train overtakes two persons walking along a railway track . The first one walks at 4.5 km/hr. The other one walks at 5.4 km/hr . The train needs 8.4 and 8.5 seconds respectively to overtake them.

A. 66 km/hr
B. 72 km/hr
C. 78 km/hr
D. 81 km/hr
Answer» E.


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