Answer:
Step-by-step explanation:
a) By proportion number of days = 12 * 50/40
= 15 days.
b) Finding the number of bags per day that 1 chicken needs:
50 chickens eat 1 bag in 12 days
so 50 chickens eat 1/12 of a bag in 1 day.
1 chicken eats 1/(12*50) of a bag in 1 day.
20 chickens for 30 days:
20 chickens eats 20(12*50) in 1 day
and in 30 days 20 eat 30*20 / (12*50)
= 1 bag.
2.
a) 5*15 = 75 days
b) (15/10) * 5 = 7 1/2 days.
c) (15/20) * 5 = 3 * 5 /4 = 3 3/4 days.
3. When she was 1 year old her youngest sister was 2 - she had the same number of sisters as when she was 3.
So the answer is 6.
