Q&A - PSLE Math
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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,
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,
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,
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,
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,
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. -
Sorry for the repeated question. Something wrong with the computer.
-
Sorry for the repeated question. Something wrong with the computer.
-
isetan:
HiHi,
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.
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 -
tianzhu:
Thanks Tian Zhu.
Hiisetan:
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.
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
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