Math, asked by ishmeetkaur60, 1 year ago

a train is running at a speed of 64km/hr and crosses a pole in 9 second. what is the length of the train?

Answers

Answered by arnavguglani05
1
time -9 seconds
speed -64km/hr=64000/3600
distance=64000/3600*9=160m
length of train=160m
Answered by Anonymous
1

Answer:

Step-by-step explanation:

ANSWER:-

Given that:-

A train running at a speed of 84 km/h

The train crosses a electric pole at 9 seconds

We need to find the length of the train.

Let's Do!

What we can do here, is first convert the given units into SI units.

84 km/h => m/s

1 metre = 1000 km

1 hour = 3600 seconds

\sf{Kmph = \dfrac{1000}{3600} = \dfrac{5}{18} \  After \ simplification}

So, we can now multiply 84 with 5/18

It was just a shortcut method, you can use it directly as well.

So, we get:-

\sf{\dfrac{84 \times 5}{18}}

\sf{ = 23.33 \ mps \ approximately}

mps means metre/second.

Now, we know that

\boxed{\sf{Speed = \dfrac{Distance}{Time} }}

\boxed{\sf{\mapsto Distance = Speed \times Time}}

Now, we need is length ie Distance.

So, 23.33*9 = 209.97 metres is the length of the train.

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