Q&A - PSLE Math

[Michaelia0816]

7)Car x, car y and car z together crossed point a at noon as they were heading for point b. by 1.30 pm, car x was 75 km from point a and car y was ahead of car x by 6km. By this time, car x had already travelled the combined distance of the other two cars from point a. What was the difference in speed between car z and y?

[Michaelia0816]

the ratio of a van’s speed to that of a car’s speed was 3:5. If the van took 1 minutes more to cover a distance of 0.5 km than the car, find the speed of the van in km/h. ( hint: first convert 0.5 km/min to km/h)

[Michaelia0816]

9)A motorist took 3 h to travel from p to r while a cyclist took 5h20min to travel from s to q. If both of them set off at the same time, how far away from p did they pass by each other?

[Michaelia0816]

Roger took 1/1/3 h to drive from Greenland to pinkcity at an average speedof 0km/h. After this, he increased his speed by 25% and continued driving to redsville for 40 minutes.

A) how far did Roger drive together?
B) find his average speed for the whole journey?

[tianzhu]

Hi Michaelia0816


ah girl

Good Morning.

I observe you’re posting quite a number of questions.

Do you have difficulties solving them or just wanted to check the answers?

Best wishes

[Michaelia0816]

Peter set off from x for z at 10.45 am at a uniform speed of 64 km/h. 20 minute later, Dave set off from z to x at the uniform speed and he passed Peter at y.

The distance between x and y is 96km and the distance between y and z is 140km.
A) find the speed at which Dave was travelling?
B) at what time would Dave arrive at x?

[Michaelia0816]

tianzhu:

Hi Michaelia0816


ah girl

Good Morning.

I observe you’re posting quite a number of questions.

Do you have difficulties solving them or just wanted to check the answers?

Best wishes

Diffculties solving them! I just started on speed but my Cher had already given us a lot of hard question, to me only!

[Michaelia0816]

I still have have 13 question to post! So much question!

[tianzhu]

Michaelia0816:

Diffculties solving them! I just started on speed but my Cher had already given us a lot of hard question, to me only!

Hi

You mean those difficult questions were given to you only and not to other students.

Best wishes

[Michaelia0816]

Not, I meant I not sure how so to me! Just help me leh, I still got higher Chinese sa1 on Monday and needs to revise, my iPad had only left 10% to check on the method!