a person enters a building on the first floor and runs up to the third floor in 30 seconds at this rate, how many seconds will it take the person to run from the first floor up to the 6th floor in the building?
It will take 60 seconds. Because they went in at the first floor and ran up to the third in 30 seconds, if they go down and go up to the 6th floor it would be a minute, because 30+30 is 60
