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Running at three-fifths of its usual speed, a train takes 3 hours 20 minutes longer than usual. What is its usual journey time?

Competition practiceProblems on Trains

A2 hours
B3 hours
C5 hours
D8 h 20 min

Step-by-Step Solution

At

\frac{3}{5}

the speed, time is

\frac{5}{3}

of usual — an extra

\frac{2}{3}

of usual time

= 200

min. Usual

= 300

min

= 5

h. (8 h 20 min is the slower time.)

Answer: C) 5 hours

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