Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
secondary 3 | A Maths
One Answer Below
Anyone can contribute an answer, even non-tutors.
need help with this qn, pls explain too :)
Date Posted: 3 years ago
Views: 315
Same story, this involves
(i) length scale
(ii) area scale
(iii) volume scale
This is the kind which I was saying earlier.
(i) length scale
(ii) area scale
(iii) volume scale
This is the kind which I was saying earlier.
i didnt manage to get the correct ans for b and c tho
Something is not right with the given values. There is a mismatch between the given volume of VCD and the calculated volume of VCD.
See 1 Answer
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Alternatively, for part c, we can also use 1/3 x pi x 6 x 6 x 8.
Somehow the volume VCD given (42pi) and the volume VCD calculated from lengths (1/3 x pi x 3^2 x 4) do not match at all.
Somehow the volume VCD given (42pi) and the volume VCD calculated from lengths (1/3 x pi x 3^2 x 4) do not match at all.
Date Posted:
3 years ago
area ratio of base is also the area scale? because i thought cannot for circular base
The circular bases are in fact geometrically similar. This is an aspect of geometrically similar figures - all aspects of the figure, including the base areas, are similar.
So, the area scale can be applied as usual.
So, the area scale can be applied as usual.
if the question never tell us to leave the ans in pi can we choose to leave it in pi? like part c
It depends on the circumstances. What I will do is to first write the pi version, then the decimal version, unless they ask us to express in exact form or to 3 sf. But here, I choose to leave it in exact form because they presented the value as 42pi.
thx :)
360 Tutoring Program