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

7.2 km

Step-by-step 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 =
`(S_(woman) )/(v_(woman) )`

so,

`S_(dog)(S_(woman) )/(v_(woman) )`

plug the values You will get the answer.