Question

.A container ship is overtaking an oil tanker on the way out of Harwich Harbor, and the first mate notices that if he starts walking from the front of the container ship when the two ships start overlapping, he reaches the back as the two ship separate. He walks at 3 km/hour. If the container ship is 100 m long, and travelling at 12 km/hour, how long is the oil tanker?

Answer 1

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

$v_{21}=v_{2}-v_{1}$

Put the value into the formula

$v_{21}=12-3$

$v_{21}=9\ km/h$

The distance is 200 m.

We need to calculate the time

Using formula of time

$v=\dfrac{d}{t}$

$t=\dfrac{d}{v}$

Put the value into the formula

$t=\dfrac{200}{9\times\dfrac{5}{18}}$

$t=80 sec$

Hence, The time of oil tanker will be 80 sec.