Answer:
The time of oil tanker will be 80 sec.
Explanation:
Given that,
He walks at 3 km/hour.
If the container ship is 100 m long, and travelling at 12 km/hour.
The distance will be 200 m.
We need to calculate the relative velocity
Using formula of relative velocity
[tex]v_{21}=v_{2}-v_{1}[/tex]
Put the value into the formula
[tex]v_{21}=12-3[/tex]
[tex]v_{21}=9\ km/h[/tex]
The distance is 200 m.
We need to calculate the time
Using formula of time
[tex]v=\dfrac{d}{t}[/tex]
[tex]t=\dfrac{d}{v}[/tex]
Put the value into the formula
[tex]t=\dfrac{200}{9\times\dfrac{5}{18}}[/tex]
[tex]t=80 sec[/tex]
Hence, The time of oil tanker will be 80 sec.
