Question

Exercise 5

Answer 1

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.