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A train travels at a speed of 18 m/s in the first 5 minutes, covers 7.5 km in the next 10 minutes and covers 12 km in another 10 minutes. What is its average speed (in km/h, rounded off to 1 decimal place) for the entire journey?

[SSC CGL 13th Dec 2022 Shift-3 With Answers]
A
B
C
D

EXPLANATION

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