Question

which of the following is not a case of direct variation ?A. Number of sheets of some kind are
increased when their total weight is increased
B. More quantity of petrol is required to
travel more distance with a fixed speed
C. More fees would be collected if number of students Increase in a class
D. Time taken will be less, if number of
workers is increased to complete the same
work​

Answer 1

Answer:

D is the answer

Step-by-step explanation:

the time taken will be less, if number of workers is increased to complete the same task / work......

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By the way take care of your father and mother....

Answer 2

Option (d) Time taken will be less if the number of workers is increased to complete the same work​ is not a case of direct variation.

• In the case of direct variation, one quantity increases with the increase in another quantity.
• In (a) number of sheets of some kind increases when their total weight is increased is the case of direct variation as the number of sheets and their weight is directly proportional to each other.
• In (b) More quantity of petrol is required to travel more distance with a fixed speed is the case of direct variation as the quantity of petrol is directly proportional to the distance covered.
• In (c) more fees would be collected if the number of students increases in a class is the case of direct variation as the number of students increases, the collection of fees also increases.
• In (d) Time taken will be less if the number of workers is increased to complete the same work​ is not a case of direct variation as the time taken decreases when the number of workers increases, so it is the case of inverse variation.

Hence, Option (d) Time taken will be less if the number of workers is increased to complete the same work​ is not a case of direct variation.