Question

45cows can graze a field in 15 days.how many days will 30cows take to graze the same field

Answer 1

This is a question based about proportions. In this case, the more the number of cows, the less the days taken for then to graze the fields, and this means that these two quantities are inversely proportional.

In problems of inverse proportions, the formula we use is,

x1y1= x2y2

so in this problem,

x is the variable used for cows and y is the variable used for the number of the days

x1= 45

x2= 30

y1= 15

y2 = to find...

the equation formed is as follows-

45*15= 30* y2

on solving it, we get,

y2=22. 5 days