11 Plus Exams Forum

11 dogs eat 22 tins of dog food in 6 days, how many tins of dog food would 8 dogs eat in 5 days ?

Please help anyone ...done these loads of times, but just cant remember how !

Need help ASAP !

regards

FTM

Each dog eats 2 tins in 6 days

Therefore 1/3 tin per day per dog

Hence 8 dogs in 5 days eat 8 x 1/3 x 5

= 40 / 3

=13 and 1/3 tins = 14 tins rounding up

(depends if the question says how many tins would they eat or how many would you need to buy to feed 8 dog for 5 days - note the catch for the latter - can't buy 1/3 tin!)

To begin work out how many tins one dog would eat in 6 days.
11 dogs eat 22 tins so 1 dog eats 2 tins
1 dog eats 2 tins in 6 days
1 dog eats 1 tin in 3 days
1 dog eats 1/3 tin in 1 day
8 dogs eat 8/3 tin in 1 day (2 whole tins and 2/3 of a tin)

So 8 dogs eat 8/3 times 5 = 40/3 tins in 5 days. 13 1/3 tins.

I hope that is clearer than mud, brain is still in tax return mode.

.....and here I was thinking I was the only one filing our tax returns today!

Yes, it is much clearer to keep counting in fractions right until the end.

I've filed but not paid yet! Eek! Mustn't forget tomorrow!

thanx guys...both my hubby n I did the same thing ..him in decimals and me in fractions ...but DD insisted it was wrong as her "clever friend" had a whole number !

Phew ..threw me off more than tax returns ! Hmmm thinking of some of the bizzare things people claim expenses could start a whole new thread..............
FTM

Sorry FTM, I know we went off topic but I must gloat that just for once we are actually due a refund (without any 'creative' accounting).