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How do I do this maths equation?
Its for an assessment task which is due on Monday and I just really can't get my head around this one question.
Bhawana purchases pool chlorine in a new container which holds 35kg.
Her weekly use:
3 cups on the first day of each week.
1 cup daily for the rest of the week.
She begins using this new container on the first day of a week.
How many full weeks should this container last?
This question seems so simple and I know we've done it in class before but I just cannot answer it! If you could, step it out for me rather than just answering it. I'd really like to know how to do it next time.
Thanks in advance :)
I've gotten so far as worked out how many kg's she uses each week, but how do I find out how many weeks the chlorine will last? She uses 2.5kg weekly. Do I do: 35 x 2 because 1kg equals 35 weeks, then add one to the answer because of the half?
omg sorry, each cup is equal to 250g!!
3 Answers
- ?Lv 78 years agoFavorite Answer
Firstly, a minor correction. She uses 3 cups on the first day, then 1 each of the other days. 3 + 6 = 9 cups a week.
Each cup is 250g, which is 1/4 of a kilo. So, she uses 9 * 1/4 = 2 1/4, or 2.25 kg a week, not 2.5.
To find out how many full weeks the container will last, divide 35 by 2.25
35/2.25 = 15.55
So the container will last 15 full weeks
- 8 years ago
do you mean 35 cups?
so say that in one week she'll use 9 cups a week (3+ 1x6)
35/9 = nearly 4 weeks (3.8 weeks)
