Arithmetic

Time, Speed & Distance

Medium

A train crosses a pole in 12 second and a bridge of length 170 meter in 36 second. Then the speed of the train is?

12.58 km/hr

17.14 km/hr

25.50 km/hr

28.52 km/hr

✅ Correct Option: 3

Let the speed be $v$ m/s. Crossing the pole gives length $= 12v$ ; crossing the bridge gives $12v + 170 = 36v$ , so $24v = 170$ and $v = 7.083$ m/s. Converting, $7.083 \times \frac{18}{5} = 25.5$ km/hr.

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A train crosses a pole in 12 second and a bridge of length 170 meter in 36 second. Then the speed of the train is?

Solution

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