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Viva Qn 10

10 a) Distance already travelled = 54 km/h x 2/3 h = 36 km

Remaining distance = 120 km - 36 km = 84 km

Remaining time = 2 h - 2/3 hr = 1 1/3 h Average speed = 84 km ÷ 1 1/3h = 63 km/h
b) i) average speed = 120 km ÷ 2 1/6 h = 55 1/3 km/h

ii) Total distance = 120 km + 120 km = 240 km

Total time = 2h + 2 1/6 h = 4 1/6 h

Average speed = 240 km ÷ 4 1/6h = 57.6 km/h
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ReplyDeletePresentation [0] - Hard to see whats written.

ReplyDeleteMathematical Terms [1]

Explanation of working/solution must be clear [2] - You were stuttering abit.

Understanding of concepts [2]

Accuracy of answer [2]

Presentation: (1)

ReplyDeleteThe paper was shaking at the start but it became stable after a while. The workings are kind of messy and I can't see most of the workings. YOUR VIDEO IS FLIPPED. And please cut the accent. -_-lll

Mathematical terms: (0)

I don't really hear any formulas or mathematical terms.

Explanation of working: (3)

Understanding of concepts: (2)

Accuracy of answer: (2)

Really very good blog... This blog is very informative...Great..The video is also give very good information....

ReplyDelete1. For (a), why "2 hours out of 3 hours"? How did you get the figure?

ReplyDelete2. You've also straight away talk about the number divided by another number in order to evaluate and get an answer. However, you have not explained why we divide the numbers in such a manner.

3. Similarly, part (b): have not quite explain why take certain approach when solving the problem.

4. The visual was blur, and it's a mirror reflection. Find out from your classmates how they are able to capture the video clearly.