Question
A tourist covers half of his journey by train at 60 km/h, half of the remainder by bus at 30
km/h and the rest by cycle at 10 km/h. The average of the tourist in km/h during his entire
journey is
Answer: Option C
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Let the total distance covered be 'D'
Now, average speed = `D/(Total time taken)`
= `D/(D/2/60 + D/4/30 + D/4/10)` = `1/(1/120 + 1/120 + 1/40)` =`(120)/5` = 24 km /hr
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