A) 2 min 25 s
B) 2 min 50 s
C) 3 min 20 s
D) 3 min 30 s
Correct Answer: A
Solution :
If A covers the distance of 1 km in x s, B covers the distance of 1 km in \[(x+25).\]s. If A covers the distance of 1 km, then in the same time C covers only 725 m. If B covers 1 km in \[(x+25).\]s, then C covers 1 km in \[(x+55)\]s. Thus in x s, C covers the distance of 725 m. \[\therefore \] \[\frac{x}{725}\times 1000=x+55\] \[\Rightarrow \] \[x=145\] \[\therefore \] A covers the distance of I km in 2 min 25 s.You need to login to perform this action.
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