Tutor MathsGuru: Ask me for your burning Maths questions!

[Herbie]

Hi Dharma,


Thanks for being so patience. Yr explanation is fantastic! Really appreciate yr help!

I can understand the inverse theory for Speed and Time.
However and I am just confused with the eg. below.

eg.
Speed : Speed (S)
2 : 3

Time : Time (S)
2 : 3

Tx

[Dharma]

Herbie:

Hi Dharma,


Thanks for being so patience. Yr explanation is fantastic! Really appreciate yr help!

I can understand the inverse theory for Speed and Time.
However and I am just confused with the eg. below.

eg.
Speed (R) : Speed (S)
2 : 3

Time (R) : Time (S)
2 : 3

Tx

Hi Herbie,

Distance = Speed x Time

Speed and time is ALWAYS inversely proportional to each other if Distance is constant.

Your example does not hold because it says that speed and time are directly proportional; which in fact is not true.

If Speed ( R ) : Speed ( S) = 2 : 3
Then,

Time ( R) : Time (S) = 3 : 2

[Dharma]

super star:

Hi Mathsguru

thanks for ur help.I have another problem pls help to solve this
Aurdrey & belle have some money each.If audrey spends $18 &belle spends $24 each day,audrey will still have $25 left when belle has spent all her money.If audrey spends $13 &bellespends $30each day,audrey will have $139 left when belle has spent all her money.How much money do they have altoghter?

If Audrey spends $18/day and Belle spends $24/day in M days ;

Amt they had at first
Audrey : $25 + $18M
Belle : $24M

If Audrey spends $13/day and Belle spends $30/day in N days ;

Amt they had at first
Audrey : $139 + $13N
Belle : $30N

24M = 30N
4M = 5N

25 + 18M = 139 + 13N
50 + 36M = 278 + 26N
50 + 45N = 278 + 26N
19N = 228
N = 12days

Amt of money altogether = $139 + $43(12) = $655

[firebird]

Dear Maths guru


Good morning.

Please help me on the following question:

Keane bought some marbles and gave half of them to Leon. Leon bought some stamps and gave half of them to Keane.

Keane used 5 stamps and Leon gave away 11 marbles. The ratio of the number of stamps to the number of marbles Keane had left then became 1:7 and ratio of the number of stamps to the number of marbles Leon had left became 1:5.

How many sramps did Leon buy?

Thank you.
Firebird

[ruyu]

firebird:

Dear Maths guru


Good morning.

Please help me on the following question:

Keane bought some marbles and gave half of them to Leon. Leon bought some stamps and gave half of them to Keane.

Keane used 5 stamps and Leon gave away 11 marbles. The ratio of the number of stamps to the number of marbles Keane had left then became 1:7 and ratio of the number of stamps to the number of marbles Leon had left became 1:5.

How many sramps did Leon buy?

Thank you.
Firebird

lol like last year kim and jim question where you get this?

[firebird]

Dear ruyu


The question posted by me was given from my child’s class.

Kindly help

Thank you.
Firebird

[Almighty]

Hi Dharma / MAthguru,


http://www.postimage.org/image.php?v=gxiHqdA

1) Is my answer for Qt:12 right? I need a clarification on one thing in this problem.
The shaded length of the first square is 6 cm, how can the whole length of the second square also be 6 cm? (Marked in pencil)
2)Circle question.Unable to get a hint 2 do this.Any help?

[Almighty]

firebird:

Dear Maths guru


Good morning.

Please help me on the following question:

Keane bought some marbles and gave half of them to Leon. Leon bought some stamps and gave half of them to Keane.

Keane used 5 stamps and Leon gave away 11 marbles. The ratio of the number of stamps to the number of marbles Keane had left then became 1:7 and ratio of the number of stamps to the number of marbles Leon had left became 1:5.

How many stamps did Leon buy?

Thank you.
Firebird

Hi Fire Bird,

Let m represent number of marbles
Let S represent number of Stamps

Kate : Leon
At First:
Marble - 1m : Marble : 0m
Stamps – 0 S : Stamps: 1s

After giving:
Kate : Leon
M --- ½ m : ½ m - 11
S - -- 1/2 s – 5 : ½ S
The ratio of the number of stamps to the number of marbles Keane had left then became 1:7.So,

S / m = 1: 7
1/2s -5 = 1
½ m 7
7/2 S – 35 = ½ m ------------- (1)

ratio of the number of stamps to the number of marbles Leon had left became 1:5

So, s/m = 1 : 5

½ S = 1
½ m – 11 5

5/2 S = 1/2m -11 ------------- (2)
Substituting ½ m from equation (1)

5/2 S = 7/2S-35 – 11
S = 46
Stamps bought by Leon is 46.

[Dharma]

Almighty:

Hi Dharma / MAthguru,


http://www.postimage.org/image.php?v=gxiHqdA

1) Is my answer for Qt:12 right? I need a clarification on one thing in this problem.
The shaded length of the first square is 6 cm, how can the whole length of the second square also be 6 cm? (Marked in pencil)
2)Circle question.Unable to get a hint 2 do this.Any help?

Hi Almighty,

I'm not able to read the attachment . Can u enlarge and repost? Thanks

[Almighty]

Dharma:

Almighty:

Hi Dharma / MAthguru,


http://www.postimage.org/image.php?v=gxiHqdA

1) Is my answer for Qt:12 right? I need a clarification on one thing in this problem.
The shaded length of the first square is 6 cm, how can the whole length of the second square also be 6 cm? (Marked in pencil)
2)Circle question.Unable to get a hint 2 do this.Any help?

Hi Almighty,

I'm not able to read the attachment . Can u enlarge and repost? Thanks

Sorry 2 hv wasted yr time dharma..I'm not still good in these attachments...let me try 2 get it in bigger font..