During 2021, the population of a city increased by 8% and in 2022, it increased by 10%. At the end of 2022, its population was 47520. The population of the city at the end of 2021 was:
- A40000
- B43200
- C42300
- D44000
Solution & Step-by-step Explanation
Let the population at the end of 2021 be P
2021
.
During 2022, the population increased by 10%.
Therefore, the population at the end of 2022 is:
P
2022
=P
2021
×(1+
100
10
)
47520=P
2021
×1.1
Solving for P
2021
:
P
2021
=
1.1
47520
=
11
475200
=43200
2021
.
During 2022, the population increased by 10%.
Therefore, the population at the end of 2022 is:
P
2022
=P
2021
×(1+
100
10
)
47520=P
2021
×1.1
Solving for P
2021
:
P
2021
=
1.1
47520
=
11
475200
=43200