Question

if 30 men can do job in 21 days then how many days would 45 men finish the job​

Answer 1

Answer:

14 days

Step-by-step explanation:

we can see that it is inverse variation becuase when

30 can do it 21 days

then 45 would take less time

one quantity increases and other decreases

so take 30 men as x1

and 45 men as x2

take 21 days as y1

and the unknown as y2

inverse variation formula =x1/x2=y2/y1

so 30/45=y2/21

cross multiply

30*21/45

=14days

Answer 2

Answer:

No of Mens×No of Days = constant

30×21 = 45× x

⇒x = 30×21/45  

⇒x = 14

answer= 14 days

Step-by-step explanation: