Q&A - PSLE Math

[isetan]

Hi,


Got a speed problem here. Need some help as below:-

Car P left Town A for Town B at the same time when Car Q left Town B for Town A. The average speed of Car P was 56 km/ hr and the average speed for Car Q was 72km/hr. the two cars passed each other at a point 24km from the midway of the two towns. What is the distance between Town A and Town B? Ans given is 384km.

[isetan]

Hi,


Got a speed problem here. Need some help as below:-

Car P left Town A for Town B at the same time when Car Q left Town B for Town A. The average speed of Car P was 56 km/ hr and the average speed for Car Q was 72km/hr. the two cars passed each other at a point 24km from the midway of the two towns. What is the distance between Town A and Town B? Ans given is 384km.

[isetan]

Hi,


Got a speed problem here. Need some help as below:-

Car P left Town A for Town B at the same time when Car Q left Town B for Town A. The average speed of Car P was 56 km/ hr and the average speed for Car Q was 72km/hr. the two cars passed each other at a point 24km from the midway of the two towns. What is the distance between Town A and Town B? Ans given is 384km.

[isetan]

Hi,


Got a speed problem here. Need some help as below:-

Car P left Town A for Town B at the same time when Car Q left Town B for Town A. The average speed of Car P was 56 km/ hr and the average speed for Car Q was 72km/hr. the two cars passed each other at a point 24km from the midway of the two towns. What is the distance between Town A and Town B? Ans given is 384km.

[isetan]

Hi,


Got a speed problem here. Need some help as below:-

Car P left Town A for Town B at the same time when Car Q left Town B for Town A. The average speed of Car P was 56 km/ hr and the average speed for Car Q was 72km/hr. the two cars passed each other at a point 24km from the midway of the two towns. What is the distance between Town A and Town B? Ans given is 384km.

[isetan]

Sorry for the repeated question. Something wrong with the computer.

[isetan]

Sorry for the repeated question. Something wrong with the computer.

[tianzhu]

isetan:

Hi,


Got a speed problem here. Need some help as below:-

Car P left Town A for Town B at the same time when Car Q left Town B for Town A. The average speed of Car P was 56 km/ hr and the average speed for Car Q was 72km/hr. the two cars passed each other at a point 24km from the midway of the two towns. What is the distance between Town A and Town B? Ans given is 384km.

Hi

When two cars are travelling in opposite directions, the sum of individual distances in equal to the total distance between them.

There are a few approaches to this question.

It helps to start with a simple diagram.

One possible way.

In 1h, P and Q covered 128 km (56+72).

In 1h, they passed each other at 8 km from the midpoint, 64km (128/2)

8km ----- 1h

24km ------- 3h

Therefore in 3h, they are 24km from the midpoint.

Distance between A and B ------- 3*128 ------ 384 km.

Best wishes

[isetan]

tianzhu:

isetan:

Hi,


Got a speed problem here. Need some help as below:-

Car P left Town A for Town B at the same time when Car Q left Town B for Town A. The average speed of Car P was 56 km/ hr and the average speed for Car Q was 72km/hr. the two cars passed each other at a point 24km from the midway of the two towns. What is the distance between Town A and Town B? Ans given is 384km.

Hi

When two cars are travelling in opposite directions, the sum of individual distances in equal to the total distance between them.

There are a few approaches to this question.

It helps to start with a simple diagram.

One possible way.

In 1h, P and Q covered 128 km (56+72).

In 1h, they passed each other at 8 km from the midpoint, 64km (128/2)

8km ----- 1h

24km ------- 3h

Therefore in 3h, they are 24km from the midpoint.

Distance between A and B ------- 3*128 ------ 384 km.

Best wishes

Thanks Tian Zhu.

[zanen]

MathIzzzFun:

zanen:

hello can someone help me wif my hw? Justin baked some pies. 1/3 of the pies were chicken pies & the rest were vegetable pies. He packed 3/4 of the vegetable pies into big boxes & the rest of the vegetable pies into small boxes. each big box of vegetable pies made up 1/12 of the total no. of pies. Each small box of vegetable pies made up 1/16 of the total no of pies.


How many big boxes of vegetable pies were there?

How many small boxes of vegetable pies were there?

pls check text highlighted in blue - should it be \"He packed 3/4 of the vegetable pies into small boxes & the rest of the vegetable pies into big boxes\"

or \"Each small box of vegetable pies made up 1/16 of the total no of pies\" should be \"Each small box of vegetable pies made up 1/18 of the total no of pies.\"

cheers.

sorry typo shld be \"He packed 3/4 of the vegetable pies into small boxes & the rest of the vegetable pies into big boxes\"
please help TIA