Two trains are travelling in the same dir… | Answer

Subject

Quantitative Aptitude

Topic

Speed & Distance

Two trains are travelling in the same direction at 50 km/h and 30 km/h respectively. The faster train crosses a man sitting in the slower train in 18 seconds. Find the length of the faster train.
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ক)

240 meters

খ)

180 meters

গ)

146 meters

ঘ)

100 meters

ঙ)

None of these

Explanation

Relative speed of the faster train with respect to slower train = (50-30) km/h = 20 km/h = 20 × 5/18 m/s =50/9 m/s, Distance travelled by the faster train in crossing the man = length of the faster train (let X), (Note): When a train passes a stationary man/object, the distance travelled by the train would be equal to the length of the train. Now, ∵ Distance = speed × time ⇒ X = (50/9) × 18 = 100 meters.

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Two trains are travelling in the same direction at 50 km/h and 30 km/h respectively. The faster train crosses a man sitting in the slower train in 18 seconds. Find the length of the faster train.Reading

Two trains are travelling in the same direction at 50 km/h and 30 km/h respectively. The faster train crosses a man sitting in the slower train in 18 seconds. Find the length of the faster train.

Explanation

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Two trains are travelling in the same direction at 50 km/h and 30 km/h respectively. The faster train crosses a man sitting in the slower train in 18 seconds. Find the length of the faster train.
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