Question

A motorboat embarks on a trip, heading downstream in a river in which the current flows at a rate of 1.5m/s. After 30.0 minutes, the boat has traveled a distance of 24.3 km downstream. How long will it take the boat to travel upstream to its original point of embarkation

Answer 1

Answer:

$t=2413s$

Explanation:

From the question we are told that:

Velocity $v=1.5m/s$

Time $t=30min=>30*60=>1800$

Distance $d=24.3km$

Generally the Newton's equation for Speed going down the stream is mathematically given by

 $v + u = \frac{d}{t}$

 $1.5+v=frac{24300}{1800}$

 $v=12m/s$

Therefore

 $v + u = \frac{d}{t}$

 $t=\frac{24300}{12-1.5}$

 $t=2413s$