Question

on a farm 2/7 of the cow were black while 40were white .find the total number of cow

Answer 1

heyy!!

let the total no. of cows be x then,

total black cows will be 2x/7. now,

2x/7+40=x
(2x+280)/7=x
2x+280=7x
5x=280
x=56

hence , total cows are 56

plz mark it as brianliest

Answer 2

Answer:

56

Step-by-step explanation:

Let the total number of cows in the farm was x.

Given that,  2/7 of the cow were black which means the number of black cows were $\frac{2}{7}x$

And number of white cows = 40.

Thus, we have

Total cows = White cows + Black cows

$x=\frac{2}{7}x+40\\\\x-\frac{2}{7}x=40\\\\\frac{5}{7}x=40\\\\x=8\times7\\\\x=56$

Thus, the total numbers of cows were 56.