Question

a train 75 m long , crosses a platform 125 m in length in 15 seconds find the the speed of the train in km/h​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

A train 75 m long , crosses a platform 125 m in length in 15 seconds. The speed of train is 48 km/hr

Solution:

Given that,

Time taken = 15 seconds

Convert to hours

$1\ second = \frac{1}{3600}\ hours\\\\15\ seconds = \frac{15}{3600}\ hours\\\\15\ seconds = 0.00416667\ hours$

A train 75 m long , crosses a platform 125 m in length

Therefore,

Distance = 75 + 125 = 200 meter

Convert to kilometer

1 meter = 0.001 kilometer

$200\ meter = 200 \times 0.001\ km\\\\200\ meter = 0.2\ km$

Find the the speed of the train in km/h​

$Speed = \frac{distance}{time}\\\\Speed = \frac{0.2}{0.00416667}\\\\speed = 47.99 \approx 48$

Thus speed of train is 48 km/hr

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