Who will get wet more somone running or walking in the rain?
Running increases the effective surface area of your body, because not only will the rain hit you from the top but also more on the front of your body since you run into the raindrops. When walking, you only get hit by raindrops on the top surface of your body and whatever is sticking out, like your feet when taking steps. Because of this, running gets you wet faster and over more areas of your body. Even though walking will keep you in the rain longer, it doesn’t increase the amount of water that hits you since you do not run into raindrops falling in front of you.