Question

α trαín ís runníng αt α spєєd σf 84km/hr crσssєs αn єlєctríc pσlє ín 9 sєc. thє lєngth σf thє trαín ís.

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Answer 1

Answer:

Given :-

• A train is running at a speed of 84 km/hr crosses an electric pole in 9 secs.

To Find :-

• What is the length or distance of the train.

Formula Used :-

➲ Distance = Speed × Time

Solution :-

Given :

• Speed = 84 km/hr
• Time = 9 secs = 9/3600 = 0.0025 hours

According to the question by using the formula we get,

↦ Distance = Speed × Time

↦ Distance = 84 × 0.0025

↦ Distance = 84 × 25/10000

↦ Distance = 84 × 25/10000

↦ Distance = 2100/10000

↦ Distance = 21/100

➠ Distance = 0.21 km

Now, we have to convert it into m :

↦ Distance = 0.21 × 1000

↦ Distance = 21/100 × 1000

↦ Distance = 21 × 10

➠ Distance = 210 m

∴ The length or distance of the train is 210 m .

Answer 2

Given :-

A train is running at a speed of 84 km/hr crosses an electric pole in 9 secs.

To Find :-

What is the length or distance of the train.

Formula Used :-

➲ Distance = Speed × Time

Solution :-

Given :

Speed = 84 km/hr

Time = 9 secs = 9/3600 = 0.0025 hours

According to the question by using the formula we get,

↦ Distance = Speed × Time

↦ Distance = 84 × 0.0025

↦ Distance = 84 × 25/10000

↦ Distance = 84 × 25/10000

↦ Distance = 2100/10000

↦ Distance = 21/100

➠ Distance = 0.21 km

Now, we have to convert it into m :

↦ Distance = 0.21 × 1000

↦ Distance = 21/100 × 1000

↦ Distance = 21 × 10

➠ Distance = 210 m

∴ The length or distance of the train is 210 m .