Question

A 280 m long goods train is running at 50 kmph. How much time will it take to cross a tree?

Answer 1

Answer:

It will take 20.16 sec to cross a tree.

Step-by-step explanation:

Given: A 280 m long goods train is running at 50 Kmph.

We have to find how much time will it take to cross a tree.

• As we know that the formula is used to calculate the speed is:

       $Speed=\frac{Distance}{Time}$

We are solving in the following way:

We have,

Distance = 280m

Speed = 50 Kmph.

First, we will convert speed into m/s.

So,

$50\ kmph=50\times\frac{5}{18} \ m/s\\\\50\ kmph=\frac{250}{18} \ m/s\\\\50\ kmph=\frac{125}{9}\ m/s$

So, the time it will take to cross a tree be:

$Speed=\frac{Distance}{Time}$

$=>\frac{125}{9} =\frac{280}{T} \\\\=>\frac{125}{9}\timesT=280\\\\=>T=280\div\frac{125}{9}\\\\=>T=280\times\frac{9}{125}\\\\=>T=\frac{2520}{125} \\\\=>T=\frac{504}{25}\\=>T=20.16$

Hence, it will take 20.16 sec to cross a tree.