# Transcribed Image Text: In the population of a certain village there is Zone 1, Zone 2, and Zone 3. The sum of their ages is 2160; the average age is 36;

Excerpt
the rate of one step per second. Twenty steps bring m to the top. Next day he goes up at two steps per second, reacng the top 32 steps. How many steps are there in the escalator? A. 80 B. 60 C. 50 D. 70

Transcribed Image Text: In the population of a certain village there is Zone 1, Zone 2, and Zone 3. The sum of their ages is
2160; the average age is 36; the average age of People in zone 1 and zone 2 is 39; the average
age of zone 1 and zone 3 is 36 and 2/3. If each the people in zone 1 had been 1 year older, each
in Zone 2 6 years and each in zone 37 years older, their average age would have been greater
by 5 years. Find the number of Person in zone 1 and their average ages.
A. 20, average age = 30 ycs
B. 24, average age = 35 yrs
C. 16, average age = 45 yrE
D. 28, average age = 40 yrE Transcribed Image Text: 6. A certain physicist, who is always hurry, walks up an on-going escalator at the rate of one step
per second. Twenty steps bring m to the top. Next day he goes up at two steps per second,
reacng the top 32 steps. How many steps are there in the escalator?
A. 80
B. 60
C. 50
D. 70