Sarah wants to find out how long it will take her to walk from her house to her friend's house. On the map, it shows that Sarah's house is 4 cm from her friend's house. The ratio scale of the map is 1:50000. On average, it will take Sarah 10 mins to walk 1km. How long will it take Sarah to walk to her friend's house?

Answer 1

First, we need to convert the distance on the map to actual distance in kilometers.

Since the ratio scale is 1:50000, 1 cm on the map represents 50000 cm in real life. Therefore, 4 cm on the map represents 4 * 50000 = 200000 cm in real life.

Converting 200000 cm to km, we get 2 km.

Given that Sarah takes 10 mins to walk 1 km, she will take 10 * 2 = 20 mins to walk 2 km.

Therefore, it will take Sarah 20 mins to walk to her friend's house.