Q4 of 54 Page 165

12 men can dig a pond in 8 days. How many men can dig it in 6 days?

More the number of men, lesser the days required. So, it is an inverse proportion.


Let the required no. of men be x.


⇒ 12 × 8 = 6 × x


⇒ x = = 16 men


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2

If x and y are inversely proportional, find the values of x1, x2, y1 and y2 in the table given below:



















X



8



x1



16



x2



80



Y



y1



4



5



2



y2


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