Dan and four friends planned a 32-day hike to the summit of Mt. Everest. After they bought enough fo

Dan and four friends planned a 32-day hike to the summit of Mt. Everest. After they bought enough food to last the five people 32 days, three other friends decided that they also wanted to go along on the adventure. How long will the food last now that eight people are taking the trip?

If the food last 32 days for 5 people, it lasts 32 * 5 = 160 days for 8 people.

Therefore, for 8 people, the food lasts 160/8 = 20 days