Maths, Addmaths and Statistics: Post your doubts here!

[khadijaimran]

how to do the highlighted question?

 

[Binyamine]

Anybody had unexpected results in 2016 Math D?

Also, anybody has access to May/June 2016 Math D question paper?

Thanks.

Hi the solution to June and November 2016 has already been added to this mobile application ::

Maths D YEARLY O LEvEL :: https://play.google.com/store/apps/details?id=com.anagnorisismathsolevelyearlydws.com

 

[A*****]

how to do the highlighted question?

 

[Zeerak 420]

Ok so this question is tough.

Speed of sparrow is x km/h in STILL air.

When wind is blowing at 1 KM/H, sparrow takes 5 hours to fly 12 km to nest and 12 km back again. She goes out directly into win and returns with wind behind her. Find Normal speed.

 

[aneeqgenius7]

how to solve Thought blocker

 

[Thought blocker]

View attachment 62045
how to solve Thought blocker

Voulme of cylinder = pi r^2 h
Volume of outter cylinder(VO) = pi (3.5 + r)^2 (20)
volume of inner cylider (VI)= pi r^2 (20)
Volume of solid = VO - VI
3000 = VO - VI
Solve for r
r = 5.07

 

[aneeqgenius7]

Voulme of cylinder = pi r^2 h
Volume of outter cylinder(VO) = pi (3.5 + r)^2 (20)
volume of inner cylider (VI)= pi r^2 (20)
Volume of solid = VO - VI
3000 = VO - VI
Solve for r
r = 5.07

thanks

 

[rid_aaaa]

can anybody please explain questions related to upperbond and lowerbond

 

[Thought blocker]

can anybody please explain questions related to upperbond and lowerbond

Post the question. We will see where we can help u.

 

[khadijaimran]

thank you so much

 

[A*****]

thank you so much

No pblm

 

[Enferno]

part b anyone?

4024_s15_qp21_q2

 

[A*****]

View attachment 62142

part b anyone?

4024_s15_qp21_q2

 

[Enferno]

View attachment 62143

You cant use cos rule here. How to solve without that.

 

[A*****]

You cant use cos rule here. How to solve without that.

But y can't v use it? It's not written in the question that v can not use it

 

[A*****]

I don't think that there is any other way of solving it

 

[Enferno]

But y can't v use it? It's not written in the question that v can not use it

I mean yes we can use it here. I'm looking for a way to solve without it.
Now I don't think there is.
Thank you by the way

 

[A*****]

I mean yes we can use it here. I'm looking for a way to solve without it.
Now I don't think there is.
Thank you by the way

No there isn't... in the mark scheme as well the same one is given

 

[whyareallnamestaken]

Can anyone solve question 9 of this paper?

http://papers.gceguide.com/IGCSE/Mathematics (0580)/0580_m16_qp_42.pdf

 

[Anon_Assassin]

can anybody please explain questions related to upperbond and lowerbond

We always use this in finding the area of a graph. (UPPERBOUND - LOWERBOUND)
For example in this graph,

We will find the area by subtracting the blue curve from the red curve.
This is also used when a line intersects the graph at more than two points.
Hope this answers your question.