Maths-
General
Easy
Question
In 2015 the populations of City X and City Y were equal. From 2010 to 2015 , the population of City X increased by 20% and the population of City decreased by 10%. If the population of City was 120,000 in 2010 , what was the population of City Y in 2010?
- 60000
- 90000
- 160000
- 240000
Hint:
Hint:
- A percentage is a number or ratio that can be expressed as a fraction of 100.
The correct answer is: 160000
Explanation:
- We have given In 2015 the populations of City X and City Y were equal. From 2010 to 2015, the population of City X increased by 20% and the population of City Y decreased by 10%
- We have to find what was the population of City Y in 2010.
Step 1 of 1:
1: population of city x in 2010 = 120000
it increases by 20 % in 5 years . so in 2015 it will be
Thus population of city x in 2015 is 144000.
2: the population of city x and y are same in year 2015.
3: to find= population of city y in 2010 .if it reduces by 10% in 5 years.it will be 10 % more in year 2010
4: let population of city y in year 2015 be 100.
it gets increased by 10% =90
thus-
X =160000
population of city x is .
Hence, Option C is correct.
Related Questions to study
Maths-
The area enclosed between two concentric circles is 770 cm2. If the radius of the outer circle is 21cm, calculate the radius of inner circle
The area enclosed between two concentric circles is 770 cm2. If the radius of the outer circle is 21cm, calculate the radius of inner circle
Maths-General
Maths-
A researcher surveyed a random sample of students from a large university about how often they see movies. Using the sample data, the researcher estimated that 23% of the students in the population saw a movie at least once per month. The margin of error for this estimation is 
. Which of the following is the most appropriate conclusion about all students at the university, based on the given estimate and margin of error?
A researcher surveyed a random sample of students from a large university about how often they see movies. Using the sample data, the researcher estimated that 23% of the students in the population saw a movie at least once per month. The margin of error for this estimation is . Which of the following is the most appropriate conclusion about all students at the university, based on the given estimate and margin of error?
Maths-General
Maths-
If 
, then find the value of 
If , then find the value of
Maths-General
Maths-
A right circular cone has a volume of 
cubic inches. If the height of the cone is 2 inches, what is the radius, in inches, of the base of the cone?
A right circular cone has a volume of cubic inches. If the height of the cone is 2 inches, what is the radius, in inches, of the base of the cone?
Maths-General
Maths-
In the given figure OACB is a quadrant of a circle. The radius OA = 3.5 cm, OD = 2cm. Calculate the area of shaded portion
In the given figure OACB is a quadrant of a circle. The radius OA = 3.5 cm, OD = 2cm. Calculate the area of shaded portion
Maths-General
Maths-
The inner circumference of a circular track is 220 m. The track is 7 m wide everywhere. Calculate the cost of putting up a fence along the circumference of outer circle at the rate of Rs 2 per meter
The inner circumference of a circular track is 220 m. The track is 7 m wide everywhere. Calculate the cost of putting up a fence along the circumference of outer circle at the rate of Rs 2 per meter
Maths-General
Maths-
Is 
rational or irrational? Explain.
Is rational or irrational? Explain.
Maths-General
Maths-
How many times will the wheel of a car rotate in a journey of 88 km if its known that the diameter of the wheel is 56 cm?
How many times will the wheel of a car rotate in a journey of 88 km if its known that the diameter of the wheel is 56 cm?
Maths-General
Maths-
Express the following recurring decimal as a vulgar fraction
1.3454545454545…………
Express the following recurring decimal as a vulgar fraction
1.3454545454545…………
Maths-General
Maths-
A road 3.5 m wide surrounds a circular park whose circumference is 44 m. Find the cost of paving the road at Rs. 20 per m2
A road 3.5 m wide surrounds a circular park whose circumference is 44 m. Find the cost of paving the road at Rs. 20 per m2
Maths-General
Maths-
The function is defined above. What is 
The function is defined above. What is
Maths-General
Maths-
Of the following, which is closest to the ratio of the total number of insects in all three colonies in week 8 to the total number of insects at the time of initial treatment?
Three colonies of insects were each treated with a different pesticide over an 8-week period to test the effectiveness of the three pesticides. Colonies A, B, and C were treated with Pesticides A,B , and C, respectively. Each pesticide was applied every 2 weeks to one of the three colonies over the 8-week period. The bar graph above shows the insect counts for each of the three colonies 0,2,4,6, , and 8 weeks after the initial treatment.
Of the following, which is closest to the ratio of the total number of insects in all three colonies in week 8 to the total number of insects at the time of initial treatment?
Three colonies of insects were each treated with a different pesticide over an 8-week period to test the effectiveness of the three pesticides. Colonies A, B, and C were treated with Pesticides A,B , and C, respectively. Each pesticide was applied every 2 weeks to one of the three colonies over the 8-week period. The bar graph above shows the insect counts for each of the three colonies 0,2,4,6, , and 8 weeks after the initial treatment.
Maths-General
Maths-
Express the following recurring decimal as a vulgar fraction
0.15151515………..
Express the following recurring decimal as a vulgar fraction
0.15151515………..
Maths-General
Maths-
Simplify by rationalizing:
Simplify by rationalizing:
Maths-General
Maths-
The two graphs above show the total amounts of money that Ian and Jeremy each have deposited into their savings accounts for the first seven weeks after opening their accounts. After they made their initial deposits, how much more did Ian deposit each week
The two graphs above show the total amounts of money that Ian and Jeremy each have deposited into their savings accounts for the first seven weeks after opening their accounts. After they made their initial deposits, how much more did Ian deposit each week
Maths-General
