Question

185. 20 persons can complete a work in 16 hours.
How many hours will it take to complete the work
if 4 persons leave the work?
plz step by step bata day​

Answer 1

Step-by-step explanation:

If number of persons will increase the number of hours will be less so it is in inverse variation

Therefore

Let the number of persons be x and number of hours be y

Now

ATQ

4 persons leave the work

Hence

20-4=16

Now

$x1 \times y1 = x2 \times y2$

20×16=16×y2

$y2 = 320 \div 16$

=20

Therefore the work will be completed in 20 hours

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