Q: Mohit goes to his office at the speed of 10 m/s and returns to his home at the speed of x km/hr. If average speed of Mohit for the whole journey is 12 m/s, then what is the value of x?
A.
25 km/hr
B.
15 km/hr
C.
36 km/hr
D.
54 km/hr
Correct Answer:
Option D -
Explanations:
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