Question

Which of the following are in inverse proportion: 

(i) The number of workers on a job and the time to complete the job. 

(ii) The time taken for a journey and the distance travelled in a uniform speed. 

(iii) Area of cultivated land and the crop 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

Answer 1

(i) The number of workers and the time to complete the job is in inverse proportion because less workers will take more time to complete a work and more workers will take less time to complete the same work. 

(ii) Time and distance covered in direct proportion. 

(iii) It is a direct proportion because more are of cultivated land will yield more crops. 

(iv) Time and speed are inverse proportion because if time is less, speed is more. 

(v) It is a inverse proportion. If the population of a country increases, the area of land per person decreases.