With an average speed of 40 Km/h, a train reaches its destination on time. If it goes with an average speed of 35 Km/h, it reaches late by 15 minutes. The total journey is of :

30 Km

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40 Km

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70 Km

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80 Km

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Solution

The correct option is C 70 Km
$\frac{x}{35} - \frac{x}{40} = \frac{15}{60} o r, \frac{5 x}{35 \times 40} = \frac{1}{4}$
or, $x = \frac{35 \times 40}{5 \times 4} = 70$
$∴$ Total journey = 70 Km.

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With an average speed of 40 Km/h, a train reaches its destination on time. If it goes with an average speed of 35 Km/h, it reaches late by 15 minutes. The total journey is of :

The correct option is C 70 Kmx35−x40=1560or,5x35×40=14 or, x=35×405×4=70 ∴ Total journey = 70 Km.

The correct option is C 70 Km
$\frac{x}{35} - \frac{x}{40} = \frac{15}{60} o r, \frac{5 x}{35 \times 40} = \frac{1}{4}$
or, $x = \frac{35 \times 40}{5 \times 4} = 70$
$∴$ Total journey = 70 Km.