Question

A women and her dog are out for a morning run to the river,which is located 4.0 km away.The women runs at 2.5 m/s in a straight line . The dog is unleashed and runs back and forth at 4.5 m/s between his owner and the river,until the women reaches the river . What is the total distance run by the dog?​

Answer 1

Answer:

7.2 km

Explanation:

Find the total distance that dog is running by

                                      $S_{dog} = v_{dog} t$

and use the time above that woman is taking to reach the river,

                                      t = $\frac{S_{woman} }{v_{woman} }$

so,

                                     $S_{dog}\frac{S_{woman} }{v_{woman} }$

plug the values You will get the answer.