Question

a train running at a speed of 30km/hr take 10sec.to across a platform which is 250m long.the length of train in meters...​

Answer 1

Answer:

-500 /3 metres

Explanation:

Given:

Speed of the train = 30 km/hr

30 km/hr = $30 \times \frac{5}{18} = \frac{25}{3} \ m/s$

Time taken to cross the bridge = 10 seconds

Length of the platform = 250 metres

To find :

Length of the train in metres

Let the length of train be equal to X

Distance=Speed×Time

${Length\ of\ the \ train\ + \ Length\ of\ the \ platform}$= Speed×Time

250+X=$\frac{25}{3} \times 10$

250+X=$\frac{250}{3}$

750+3X=250

X= - 500/3 metres

The length of the train is equal to

- 500/3 metres

Answer 2

Answer:

Explanation:

Given :-

Speed of train = 30 km/h = 30 × 5/18 = 25/3 m/s

Time taken, t = 10 seconds

Length of platform = 250 m

To Find :-

Length of train in metres

Formula to be used :-

Distance = Speed × Time

Solution :-

Let the length of the train be x meters.

Distance = Speed × Time

Length of train + Platform length = Speed × Time

⇒ x + 250 = 25/3 × 10

⇒ x + 250 = 250/3

⇒ 3x + 750 = 250

⇒ x = - 500/3 metres

Hence, the Length of train in metres is - 500/3 metres.