Question

4. Which of the following are in inverse proportion?
(i) The number of workers on a job and the time to complete the job
(u) The time taken for a journey and the distance travelled with 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

: Required Answer

(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