Thanks. My girl understand this method😊

Welcome, Katherine. This is what I explain to my students. By applying this concept, age-related questions should be straightforward to solve.

Total discover ran by both Tom and John around the track in order for them to meet twice = 200 + 400 = 600 m Ratio of Tom's speed to John's speed = 160 m/min : 200 m/min = 4 : 5 Distance Tom had to run to meet John for the second time = 600 m × 4/9 = 266 2/3 m

Thank you so much :) Xavier Sng

The pleasure is mine. Regards

Why is the total distance 200 + 400 m?

The two of them had to run a combined 200m to meet each other for the first time. After that they need to run another one round around the track to meet for the second time, hence an additional 400m.

Tks Xavier again for coming to the rescue.

Please don't mention it. Regards

Do you understand step 1?

yes

Step 2?

tts e semicircle. yes

What about step 3?

yes tts the triangle

so how does e triangle minus the semicircle gives u E

What about this step 4?

i understand this

Great... To find the shaded A + C + E, we do this step 5. Agree?

Thanks Adrian again for the excellent models! It's really good and clear!

dont understand :(

A pictorial explanation.

Tks Xavier!

You are most welcome. It takes either natural ability or a trained eye to see how portions of the figure relate to one another, so if one can do so the solution is very simple, and it is usually also elegant. If not, one would be faced with a daunting task of dismantling the figure and micromanaging the calculations.

This qn seems daunting at first, but after yr clear breakdown, it looks much more manageable. But still, it is difficult for a P6.

I cannot agree with you more on how difficult it is for many of us adults, not to mention the students.

totally agree

She's got every step correct. Nice work!

Thank you, Jason Oon :)

correct

👍

Thank you Wahidah Khan & Ivy Lian!