Question

On a farm, 2/7 of the coes were black, while the rest 49 were white. Find the total number of cows.​

Answer 1

Correct Question :

• On a farm, 2/7 of the cows were black, while the rest 40 were white. Find the total number of cows.

Answer :

• Total number of cows = 56

Given :

• On a farm , 2/7 of the cows were black while 40 were white

To find :

• Total number of cows

Solution :

• Let the total number of cows be x

Given that , on a farm 2/7 of the cows were black then,

• 2x/7

Number of white cows = 40

According to question,

》2x/7 + 40 = x

》(2x + 280)/7 = x

》2x + 280 = 7x

》7x - 2x = 280

》5x = 280

》x = 280/5

》x = 56

Hence , Total number of cows = 56

Verification :

》2x/7 + 40 = x

》2(56)/7 + 40 = 56

》112/7 + 40 = 56

》16 + 40 = 56

》56 = 56

Hence , Verified.

Answer 2

Answer:

56

Step-by-step explanation:

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