Atraveler is walking on a moving walkway in an airport. the traveler must walk back on the walkway to get a bag he forgot. the traveler's ground speed is 1 ft/s against the walkway and 7 ft/s divided by s with the walkway. what is the traveler's speed off the walkway? what is the speed of the moving walkway?

let t = traveler's normal walking speed
let w = walkway speed

Write an equation for each scenario
t - w = 1

t + w = 7

 t=1+w

(1+w)+w=7

1+2w=7

w=3 ft/s walkway speed

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!