19. 20 men can do a work in 20 days. How many more men are needed to complete the
work in 5 days?​

1 thought on “19. 20 men can do a work in 20 days. How many more men are needed to complete the<br />work in 5 days?​”

1. Explanation:

   Let the required number of men be x.

   Number of men ㅤ ㅤ20 ㅤ ㅤx

   Number of days ㅤ ㅤ20 ㅤ ㅤ 5

   More the number of men, less the number of days required. Therefore, this is a case of inverse variation

   By inverse variation xy = k,

   [tex]20 \times 20 = x \times 5[/tex]

   [tex]x = \frac{20 \times 20}{5} [/tex]

   [tex] x = 20 \times 4[/tex]

   [tex]x = 80[/tex]

   Therefore, 80 men are required to finish the work in 5 days.

   Answer: 80 men

   I hope this helps. 😀

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