Tutor MathsGuru: Ask me for your burning Maths questions!

[MathIzzzFun]

VivianChan:

Hi pls help


Ali left town A and travelled towards town B at speed of 90km/h.
45min later, Muthu left town B and travelled town A at speed of 120km/h.
Town X was halfway between town A and town B. Ali passed town X half an hour after Muthu had passed town X. Both speeds did not change throughout the journey. If Muthu reached town A at 2.45pm, at what time did Ali leave town A?

Thanks!

Hi

points to note:
1-> Distance travelled by Ali fro A to X (midpoint of AB)
= Distance travelled by Muthu from B to X
2-> Muthu took less time to travel from B to X --> 45 min + 30 min = 75 min less.

Ali's speed : Muthu's speed = 90 : 120 --> 3 : 4
Time ratio (of time taken by both to travel AX and BX) of
Ali : Muthu --> 4u : 3u
1u --> 75 min
Time taken by Ali to travel from A to X = 4 x 75 min = 5h
Total time taken by Ali to travel fro A to X = 10h
10h before 2.45pm --> 4.45am
Ali left at 4.45am

cheers.

[VivianChan]

MathIzzzFun:

VivianChan:

Hi pls help


Ali left town A and travelled towards town B at speed of 90km/h.
45min later, Muthu left town B and travelled town A at speed of 120km/h.
Town X was halfway between town A and town B. Ali passed town X half an hour after Muthu had passed town X. Both speeds did not change throughout the journey. If Muthu reached town A at 2.45pm, at what time did Ali leave town A?

Thanks!

Hi

points to note:
1-> Distance travelled by Ali fro A to X (midpoint of AB)
= Distance travelled by Muthu from B to X
2-> Muthu took less time to travel from B to X --> 45 min + 30 min = 75 min less.

Ali's speed : Muthu's speed = 90 : 120 --> 3 : 4
Time ratio (of time taken by both to travel AX and BX) of
Ali : Muthu --> 4u : 3u
1u --> 75 min
Time taken by Ali to travel from A to X = 4 x 75 min = 5h
Total time taken by Ali to travel fro A to X = 10h
10h before 2.45pm --> 4.45am
Ali left at 4.45am

cheers.

Thanks so much! Appreciate it.

[ongmt]

Plse help


1) The material needed to make a jacket is 120% of that used to make a pair of trouser, If 0,5m more was used to make 2 similar jackets than a pair of trousers, how many metres of clothes were used to make 5 jacket?

[MathIzzzFun]

ongmt:

Plse help


1) The material needed to make a jacket is 120% of that used to make a pair of trouser, If 0,5m more was used to make 2 similar jackets than a pair of trousers, how many metres of clothes were used to make 5 jacket?

material needed for
1 pair of Trousers --> 10u
1 jacket --> 12u
2 jackets --> 24u

0.5m more used to make 2 jackets than a pair of trousers, so
24u - 10u = 14u
14u --> 0.5m
2u --> 1/14 m

5 jackets --> 60u --> 30 x 1/14m = 2 1/7 m

cheers.

[Omar Father]

Dear Guru,

Do you tutor Sec 3 E.Math?

[MathIzzzFun]

Omar Father:

Dear Guru,

Do you tutor Sec 3 E.Math?

yes, I have pm you.

cheers.

[Bokwa]

Hi MathsGuru,


Please help me with the questions below.

Q: The weight of a tine when it was half full of iron nail is 2.4kg. When 0.5Kg of iron nail were poured in, the tin was 5/8 full. Find the weight of the empty tine.

Thanks.

[MathIzzzFun]

Bokwa:

Hi MathsGuru,


Please help me with the questions below.

Q: The weight of a tin when it was half full of iron nail is 2.4kg. When 0.5Kg of iron nail were poured in, the tin was 5/8 full. Find the weight of the empty tin.

Thanks.

treat the mass of the tin and iron nails as separate items...

1/2 = 4/8

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cheers.

[Bokwa]

Hi,


That’s great! Thanks so much for solving this problem

[VivianChan]

http://i46.tinypic.com/sc5ils.jpg\">


Dear Gurus,

I need help for the above question. What is the length of BD?

Thanks.