Add assumption that the bottom shaded triangle is a equilateral triangle and you would be able to solve it.

How could we assume that? They did not mention However, the height of the triangle is 7cm. Is there any way we can calculate more mathematically than to assume the base of triangle is 12/3=4cm (model ans is that btw)

It has been mentioned before in this forum that the original question states that an equilateral triangle is formed in the space bordered by the triangles A and B, and the bottom edge of the paper. Other forum contributors have also made calculations (with trigonometry) and found that it is simply not possible for the triangle in question to be equilateral.

Is the answer d ?

no

#Raymond i think you did it right .but could you please upload a clearer picture ,little more close up ..i really need help ...thank you

your ans is ryt but i didn't get your explanation

I assume this is grade 8 Mathematics. I got the various lengths through Pythagoras' Theorem and TOA CAH SOH. Since these are special angles, the ratios should be obtained easily. Finally, I applied the Trapezium Area Formula.

Are you an international student studying in Singapore? In NPS?

no i am from india and i am not inter international student

definitely very good explanation #Xavier...a good method for mcq ques because time limit matters in these kind of ques ...thank you very much

The pleasure is all mine. Regards

(a) 7/8 kg × 5/7 × 3/5 = 3/8 kg (b) 3/8 kg × 1/6 = 1/16 kg or 0.0625 kg

Thank you Xavier Sng and Teo Kai Meng

Glad to assist! Regards

Mine look so complicated compared to Xavier's solution. 😀

Oops. Looks like my part b is wrong

Made a slight mistake in b). Resend.

No worries Mister Yeo. We all share share.

Thankful for the quick response👍👍😍

Please don't mention it. Mister Yeo and I like to solve questions. Thank you for a nice question. Regards

Thank u :)

You are most welcomed

I don't understand how you get 8ut + 24

D*1.25 = 10u+30. Hence D = (10u+30)/1.25 = 8u + 24. Hope this help to explain.

Prefer using ratio method than model, maybe can help to understand the way to tackle such question