Please help on this question
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Please help on this question
Could someone please help on this question?
Ladybirds eat greenfly.
On one bush, there are enough greenfly to feed 9 ladybirds for 4 hours.
a) How long would the greenfly last if there were only 6 ladybirds?
b) How many bushes would be needed to feed 36 ladybirds for 2 hours
Ladybirds eat greenfly.
On one bush, there are enough greenfly to feed 9 ladybirds for 4 hours.
a) How long would the greenfly last if there were only 6 ladybirds?
b) How many bushes would be needed to feed 36 ladybirds for 2 hours
Re: Please help on this question
just edited to delete my DS confusing post
Last edited by aargh on Tue Jan 03, 2012 6:24 pm, edited 1 time in total.
Re: Please help on this question
Won't it be 2 bushes for the second question.
1 bush = 9 lady birds for 4 hours = 18 lady birds for 2hours
Therefore, 2 bushes can feed 36 lady birds for 2hours.
1 bush = 9 lady birds for 4 hours = 18 lady birds for 2hours
Therefore, 2 bushes can feed 36 lady birds for 2hours.
Re: Please help on this question
Well yes it will svg123
That rather confusing post above seems to have been posted by DS and he missed off his reason for the first answer.
I have had words with him about going on my forums How do I delete it?
That rather confusing post above seems to have been posted by DS and he missed off his reason for the first answer.
I have had words with him about going on my forums How do I delete it?
Re: Please help on this question
Don't think you can delete a post completely. Editing it as you have done is best.
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Re: Please help on this question
a) One bush allows 9 ladybirds to eat for 4 hours.
That's 36 "eating hours" in total.
If there were only 6 ladybirds, then the 36 hours would last them 6 hours.
b) One bush lets 9 feed for 4 hours. Again, allowing 36 "eating hours"
This 36 hours from one bush should allow 18 to feed for 2 hours.
We need enough bushes for 36 ladybirds for 2 hours - so two bushes should be enough.
That's how I've worked it out - apologies if wrong!
=
ORIGINAL QUESTION BELOW
Ladybirds eat greenfly.
On one bush, there are enough greenfly to feed 9 ladybirds for 4 hours.
a) How long would the greenfly last if there were only 6 ladybirds?
b) How many bushes would be needed to feed 36 ladybirds for 2 hours
That's 36 "eating hours" in total.
If there were only 6 ladybirds, then the 36 hours would last them 6 hours.
b) One bush lets 9 feed for 4 hours. Again, allowing 36 "eating hours"
This 36 hours from one bush should allow 18 to feed for 2 hours.
We need enough bushes for 36 ladybirds for 2 hours - so two bushes should be enough.
That's how I've worked it out - apologies if wrong!
=
ORIGINAL QUESTION BELOW
Ladybirds eat greenfly.
On one bush, there are enough greenfly to feed 9 ladybirds for 4 hours.
a) How long would the greenfly last if there were only 6 ladybirds?
b) How many bushes would be needed to feed 36 ladybirds for 2 hours