Question

A woman and her dog are out for a morning run to the river, which is located 4.2 km away. the woman runs at 2.2 m/s in a straight line. the dog is unleashed and runs back and forth at 4.0 m/s between his owner and the river, until the woman reaches the river. what is the total distance run by the dog?

Answer 1

so the distance covered will be 7.636 km

Step-by-step explanation:

Answer 2

distance between woman and river is 4.2 km

speed of the woman = 2.2 m/s

now the time taken by the woman to reach the river is given as

`t = (d)/(v)`

`t = (4200)/(2.2)`

`t = 1909.1 s`

now we have to find the distance covered by the dog in the same time

`d = v_(dog) * t`

`d = 4 * 1909.1`

`d = 7636.4 m = 7.636 km`

so the distance covered will be 7.636 km