John and Jenny stood at a point facing the north. John left Jenny in the morning and walked towards the west for 3 km, taking 15 minutes. Then he moved towards the south for 4 km, taking 25 minutes. What is the shortest distance Jenny needs to travel to meet John?

John and Jenny stood at a point facing north.
John left Jenny in the morning.
He walked 3 km west in 15 minutes.
Then he moved 4 km south in 25 minutes.

According to the given information, Path diagram will be:

Using the Pythagoras's theorem:

​$$d = \sqrt{(3^2) + (4^2)}$$

Therefore, shortest distance Jenny needs to travel to meet John is 5 Km towards South-West direction.

Thus, the correct option is (c) 5 Km