Question 1119804
A goat eats 225 kg. of hay in 45 days, while a cow eats the same amount in 15 days.
 In how many days could they eat 225 kg. of hay together?
:
Find how much each eats in one day
g: 225/45 = 5 kg/day
c: 225/15 = 15 kg/day
:
let d = no. of days for both to eat 225 kg
5d + 15d = 225
20d = 225
d = 225/20
d = 11{{{1/4}}} days