1. A Person travel Equilateral triangular area with the speed of 12kmph, 24kmph and 8kmph along the planes of the triangular field. Find the average speed of the entire journey. (in Kmph)





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  • By: anil on 05 May 2019 01.13 am
    Since, the distance travelled is equal on the three sides, hence average speed will be the harmonic mean of the speeds. = $$frac{3}{frac{1}{12}+frac{1}{24}+frac{1}{8}}$$ = $$frac{3}{frac{2+1+3}{24}}$$ = $$frac{3}{6} imes24=12$$ km/hr => Ans - (C)
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