In a 100 m race, A can beat B by 25 m and B can beat C by 4 m. In the same race, A can beat C by:
A. 21 m
B. 26 m
C. 28 m
D. 29 m
Answer: Option C
Solution(By Examveda Team)
$$\eqalign{ & A:B = 100:75 \cr & B:C = 100:96 \cr & \therefore A:C = {\frac{A}{B} \times \frac{B}{C}} \cr & = {\frac{{100}}{{75}} \times \frac{{100}}{{96}}} \cr & = \frac{{100}}{{72}} \cr & 100:72 \cr & \therefore A\,\text{beats}\,C\,by \cr & = \left( {100 - 72} \right)m \cr & = 28\,m \cr} $$Join The Discussion
Comments ( 1 )
Related Questions on Races and Games
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In a 100 m race, A beats B by 10 m and C by 13 m. In a race of 180 m, B will beat C by:
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((100/75)(100/96))=25/18 =25:18 ie 25-18=7
how to got the ans as 28 m????