Question

Which is direct and which is inverse proportion ? no.of workers on a job and the time to complete the job?

Answer 1

in direct proportion if one value is increased/decreased then the other is too increased/decreased respectively and in inverse proportion if one value is increased/decreased the other is decreased/increased respectively

Answer 2

Answer:

let's understand with some examples

(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.  

(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.  

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Step-by-step explanation: