Question

a train traveling at 69 km/hr passes through a 850 m long tunnel. For how long a passenger traveling in that train has to remain inside the tunnel? plz answer. ​

Answer 1

Given:

Speed of the train = 69 km/h

Length of the tunnel = 850m

To Find:

The length of time that a passenger on the train will remain in the tunnel

Explnation:

The passenger is considered to be in the tunnel the moment the location where the passenger sits in entered the tunnel and is out of the tunnel when the location where the passenger sits in is out of the tunnel. (Therefore, the length of the train is not taken into consideration here)

Formula Needed:

$\text{Time} = \dfrac{\text{Distance} }{\text{Speed} }$

Solution:

Convert the distance to metre:

Since the speed given is km per hour, we will need to convert the unit for the distance to meter.

$1000 \text{ m} = 1 \text{ km}$

$850 \text{ m} = \dfrac{1}{1000} \times 850$

$850 \text{ m} = 0.85 \text{ lm}$

Find the time the passenger is in the tunnel:

When we are using the formula to find the time, we have to ensure that all units used are consistent,

$\text{Time} = \dfrac{\text{Distance} }{\text{Speed} }$

$\text{Time} = \dfrac{\text{0.85} }{\text{69} }$

$\text{Time} =0.0123 \text { hour}$

Convert the time taken to seconds:

Since the time that the passenger is so short, it will be more logical to give teh time using a smaller units instead of hour.

$\text{Time} =0.0123 \text { hour}$

$\text{Time} =0.0123 \times 60 \times 60 \text { seconds}$

$\text{Time} =44 \text { seconds}$

Answer: 44 seconds

Answer 2

Step-by-step explanation:

I hope it is helpful for u