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?  Choose the most appropriate option:  A) 21 (1/9)  B) 21 (1/3)  C) 21 (1/2)  D) 21 (5/3)  E) 21 (1/6)
Let the total distance be x km   total time taken = (x/4)/16 + (3x/4)/24 = x/64 + x/32 = 3x/64   Average speed = x/(3x/64) = 64/3kmph = 21 (1/3)kmph.'   Answer: 21 (1/3)
<result>B</result>
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?