To find the total distance traveled by persons A and B, we need to determine the distance covered by each person and then add them together.
First, let's calculate the distance covered by person A. Since person A gets out on floor 14, we need to calculate the number of floors covered between the ground level and floor 14. Given that each floor is spaced 2.2 meters apart, we can find the distance by multiplying the number of floors by 2.2.
The number of floors between the ground level and floor 14 is 14 - 1 = 13 floors.
Distance covered by person A = 13 floors * 2.2 m/floor = 28.6 meters.
Second, let's calculate the distance covered by person B. Person B starts at ground level, goes up to floor 17, and then returns immediately to floor 14. This means person B covers the distance from ground level to floor 17 and then from floor 17 back to floor 14.
To calculate the distance covered by person B, we need to find the distance from the ground floor to floor 17 and then double it to account for the return trip.
The number of floors between the ground level and floor 17 is 17 - 1 = 16 floors.
Distance covered from ground to floor 17 = 16 floors * 2.2 m/floor = 35.2 meters.
Now, let's double the distance covered from ground to floor 17 to account for the return trip.
Total distance covered by person B = 2 * 35.2 meters = 70.4 meters.
Finally, to find the total distance traveled by persons A and B, we add the distances covered by each person.
Total distance = distance covered by person A + distance covered by person B
Total distance = 28.6 meters + 70.4 meters = 99 meters.
Therefore, the total distance traveled by persons A and B is 99 meters.
Now let's move on to the second question.
To find the average speed attained by the elevator, we need to divide the total distance traveled by the elevator by the time it took to cover that distance.
We know that person B arrives at ground level at 08h03, and the elevator started at 08h00. Therefore, the time taken by the elevator is 08h03 - 08h00 = 3 minutes.
Since we have to express the time in the same units as the distance, we need to convert 3 minutes to seconds. There are 60 seconds in a minute, so 3 minutes is equal to 3 minutes * 60 seconds/minute = 180 seconds.
Now, we can calculate the average speed attained by the elevator.
Average speed = Total distance / Time taken
Average speed = 99 meters / 180 seconds = 0.55 meters per second.
Therefore, the average speed attained by the elevator is 0.55 meters per second.
Moving on to the third question,
To find the time it will take for a person to go from ground level to the top of the building, assuming the top floor is floor 20, we need to calculate the number of floors between the ground level and floor 20 and then convert it into time.
The number of floors between the ground level and floor 20 is 20 - 1 = 19 floors.
Since each floor is spaced 2.2 meters apart, total distance covered = 19 floors * 2.2 meters/floor = 41.8 meters.
We can use the average speed attained by the elevator to find the time taken to cover this distance.
Time = Distance / Speed
Time = 41.8 meters / 0.55 meters per second = 76 seconds.
Therefore, it will take approximately 76 seconds for a person to go from the ground level to the top of the building.