Question

Q4) A contractor undertook a contract to complete a part of a stadium in 9 months with a team of 560 persons. Later on, it was required to complete the job in 5 months. How many extra persons should he employ to complete the work?

According to Direct and inverse proportion
Class 8
pls solve properly​

Answer 1

Answer:

let the number of workers=X

let " " " " " of months=y

now we can see that one quantity increase and second decreases so

=x1×y1=x2×y2

=560×9=5×y2

= 4940=5×y2

=4940/5=y2

=988=y2

now more workers needed =428

Answer 2

Step-by-step explanation:

let the number of workers =x

let the number of months =y

Now we can see that one quantity increase and second decrease so

=x1 x y1 = x2xy2

=560*9=5xy2

=4940=5xy2

=4940/5=y2

=988=y2

Now more workers needed =428

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