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Question
A person covered one-fourth of the total distance at 26 kmph and remaining distance at 24 kmph. What is the average speed for the total distance?
Options:
A .  21(2/3) kmph
B .  21 (1/3) kmph
C .  22 (1/3) kmph
D .  22 (2/3) kmph
E .  None of these.
Answer: Option B


Let the total distance be x km total time taken = (x/4)/16 + (3x/4)/24 = x/64 + x/32 = 3x/64Average speed = x/(3x/64) = 64/3kmph = 21 (1/3)kmph.


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