Question

A farmer has enough food to feed 21 animals in his cattle for 5 days. How long would the food last if 6 animals are transferred to another farmer from his cattle?​

Answer 1

Answer:

ANSWER IS 7

Step-by-step explanation:

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Answer 2

Answer:

7 days

Step-By-Step Explanation:

If the number of animals increases, then it will take fewer days to last.

Then the two quantities are in inverse proportions.

Let the required number of days be p.

$\because x_1y_1 = x_2y_2$

Where,

$x_1 = 21, \: y_1 = 5, \: x_2 = 15$ and $y_2 = p$ (let)

=> 21 × 5 = 15 × p

=> p = 21 × 5/15

=> p = 7

Hence the required number of days = 7.