1. Which of the following are in inverse proportion?
(1) The number of workers on a job and the time
(i) The time taken for a journey and the distance
(ii) Area of cultivated land and the crop
were
1 for
iers
to complete the job.
ood
travelled at a uniform speed.
harvested.
(iv) The time taken for a fixed journey and the
speed of the vehicle.
(v) The population of a country and the area of
land per person
Answers
Answer:
(i) We know that more is the number of workers to do a job, less is the time taken to finish the job.
So, it is a case of inverse proportion.
(ii) Considering uniform speed, as the distance to be travelled increases, the time taken to cover it will also increase.
So, this is a case of direct variation.
(iii) Clearly, more is the area of cultivated land, more is the crop harvested.
So, it is a case of direct proportion.
(iv) We know that the more will be the speed of the vehicle, the distance will be covered in lesser time.
So, it is a case of inverse proportion.
(v) Clearly, more is the population, less is the area of land per person in a country.
So, it is a case of inverse proportion.
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