Question

In a farm, each cow eats twice as much grass as each
sheep. The cost of grass for 10 cows and 40 sheep for
20 days is *Rs900. Find the cost of grass for 20 cows and
10 sheep for 18 days (Rs).​

Answer 1

Answer:

We can form 2 equations from above information:-

40[80x + 20(2x)]=1800

36[20x + 40(2x)]=?

solving first equation,

40(80x+40x) =1800

40(120x) =1800

X= 0.375

Now putting the value in 2nd equation

36[(20×0.375) + (80×0.375)]

36(7.5+30)

36 × 37.5 = 1350

(Answer)