# 4. GCSE Maths

Watch
Announcements
Thread starter 3 weeks ago
#1
need help with this questions please
Last edited by Madz178; 3 weeks ago
0
3 weeks ago
#2
What have you done so far?
0
Thread starter 3 weeks ago
#3
(Original post by mqb2766)
What have you done so far?
hi so i haven't done anything but what i am thinking is that i should find the area of each shape then add it up - divide by thirty and that's all i've got
0
3 weeks ago
#4
(Original post by Madz178)
hi so i haven't done anything but what i am thinking is that i should find the area of each shape then add it up - divide by thirty and that's all i've got
Post your progress if / when you have a problem then.
0
Thread starter 3 weeks ago
#5
(Original post by mqb2766)
Post your progress if / when you have a problem then
square- 36^2=1296
semicircle =508.94 x 3=1526.82
1526.82+1296/30= 94.094
but i don't know what i actally worked out and what i should do to find the cost
0
3 weeks ago
#6
(Original post by Madz178)
square- 36^2=1296
semicircle =508.94 x 3=1526.82
1526.82+1296/30= 94.094
but i don't know what i actally worked out and what i should do to find the cost
You know the area, so you can work out the mass you need.
Then work out the number of bags needed to get that mass.

Your area sounds about right, but not sure what the 94 represents.
Last edited by mqb2766; 3 weeks ago
0
Thread starter 3 weeks ago
#7
(Original post by mqb2766)
You know the area, so you can work out the mass you need.
Then work out the number of bags needed to get that mass.

Your area sounds about right, but not sure what the 94 represents.
i don't
understand how i should do that could you explain please??
0
3 weeks ago
#8
(Original post by Madz178)
i don't
understand how i should do that could you explain please??
How much (mass) would you need for
1 m^2 ...
2 m^2 ...
3 m^2 ...
...
Guess you can spot/understand what to do?

Then work out the number of bags?
Last edited by mqb2766; 3 weeks ago
0
Thread starter 3 weeks ago
#9
(Original post by mqb2766)
How much (mass) would you need for
1 m^2 ...
2 m^2 ...
3 m^2 ...
...
Guess you can spot/understand what to do?

Then work out the number of bags?
so it doubles 1=30 2=60 3=90
then what i did is i conveted 10 kg into g= 100000 then divided by 30=333.33 recurring then i dvided by 30 it so i think i worked out that for a so buy a one 10kg bag the square metre has to be 11
so would i do 94/11 then multiplied it by the cost f the 10kg bags???
0
3 weeks ago
#10
(Original post by Madz178)
so it doubles 1=30 2=60 3=90
then what i did is i conveted 10 kg into g= 100000 then divided by 30=333.33 recurring then i dvided by 30 it so i think i worked out that for a so buy a one 10kg bag the square metre has to be 11
so would i do 94/11 then multiplied it by the cost f the 10kg bags???
I have no idea what you're describing. How much (in grams) is required for your area?
0
Thread starter 3 weeks ago
#11
(Original post by mqb2766)
I have no idea what you're describing. How much (in grams) is required for your area?
i don;t understand how i would work thtat out
0
3 weeks ago
#12
You answered it for a simplified problem in the previous post. Use the actual area rather than the simple areas.
Last edited by mqb2766; 3 weeks ago
0
Thread starter 3 weeks ago
#13
(Original post by mqb2766)
You answered it for a simplified problem in the previous post. Use the actual area rather than the simple areas.
i don't understand what your are trying to make me work out so the area is 2822.82 actual area then 30 g are needed for every square metre so you would divide it by 30 to get 94 so there are 94 square metre that need 30 g i think??
0
3 weeks ago
#14
(Original post by Madz178)
i don't understand what your are trying to make me work out so the area is 2822.82 actual area then 30 g are needed for every square metre so you would divide it by 30 to get 94 so there are 94 square metre that need 30 g i think??
How much for 1, 2, 3, 4, 5... square metres? How much (mass) for 2800 (approximately) square metres?

What does your 94 represent?
0
Thread starter 3 weeks ago
#15
(Original post by mqb2766)
How much for 1, 2, 3, 4, 5... square metres? How much (mass) for 2800 (approximately) square metres?

What does your 94 represent?
1 =30 2=60 3=90 4=120 5=150
i think the 94 is wrong
i think you do 2822.82 x 30=84684.6 so that's how much mass i think
then would i need to divide by 10,000 to find out how many bags apprximately and then multiply by cost
0
3 weeks ago
#16
(Original post by Madz178)
1 =30 2=60 3=90 4=120 5=150
i think the 94 is wrong
i think you do 2822.82 x 30=84684.6 so that's how much mass i think
then would i need to divide by 10,000 to find out how many bags apprximately and then multiply by cost
Yes. Remember the number of bags is a whole number.
Last edited by mqb2766; 3 weeks ago
1
Thread starter 3 weeks ago
#17
(Original post by mqb2766)
Yes.
thanks so much for your help
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

Yes (250)
75.3%
No (82)
24.7%