Q&A - PSLE Math

[Shimmer]

tianzhu:

Shimmer:

Hi


Anyone help on this question.

Nancy started cycling from point X to the library at 9am at a uniform speed of 500m/min. At 9.10am, Nancy passed Sam as he started cycling from Y towards the library at a certain uniform speed. At 9.20am, Sam was 1 km ahead of Nancy. They continued cycling towards the library and Sam reached there at 9.37am.
A) What was Sam speed ? Leave your answer in km/ h.
B) What was the distance from point X to the library ? Leave your answer in km.

Hi

Any diagram provided for this question?

From 9.10am to 9.20am

In 10 minutes, Nancy covered 500*10 ------ 5000 m ------ 5 km

In 10 minutes, Sam covered ------ 5 + 1 ------ 6 km.

Sam’s speed ------ 6/1/6 ----- 36 km/h

From 9.10am to 9.37am, Sam travelled 27/60*36 ------ 16.2

Distance from point X to the library ------ 5 + 16.2 ------ 21.2 km

Best wishes

Thanks Tianzhu, but Nancy start at 9am not 9.10am.

[Shimmer]

One more question please !


Bottles A, B and C contains 2.03 litres of oil altogether. 1/5 of the oil in bottle A is transferred to bottle B, after that 1/5 of the oil in bottle B is transferred to bottle C. Now bottle A has twice the amount of oil in bottle B and bottle B has twice the amount of oil in bottle C.
A) How much oil was transferred from bottle A to B ?
B) How much oil was in bottle C at first ?

[Michaelia0816]

Thx pls help with my next post

[Michaelia0816]

Thx pls help with my next post

[tianzhu]

Shimmer:

Thanks Tianzhu, but Nancy start at 9am not 9.10am.

Hi

Yes, Nancy [email protected]

That's why we add 5 to 16.2

From 9am to 9.10am , Nancy covered 5 km.

Draw a simple diagram if it's not provided in the original question.

Best wishes

[Michaelia0816]

Thx, do help with the post I posted just now too

[tianzhu]

Winx5015:

(3). Ali and Ben had $150.30 at first. Ali gave 1/2 of his money to Ben. Ben then gave 2/5 of the total he had to Ali. In the end, each of them had the same amount of money. How much did each boy have at first?

Hi

Your Q3 is quite similar to this question.

Hope this helps.

Best wishes

http://farm6.staticflickr.com/5213/5473328668_0005b89f67_z.jpg\">

[Michaelia0816]

Tianzhu, Can I have the picture of the guess and check or give me a clue, it my HW

[Michaelia0816]

I not sure about the guess and check, I cannot do it

[tianzhu]

Michaelia0816:

Tianzhu, Can I have the picture of the guess and check or give me a clue, it my HW

Hi girl

Tomorrow, I’ll PM to you.

Best wishes