ICSE − Q & A

the simple interest in 3 years is rs1200 and the compound interest in 2 years is rs832.Find the fllowing:-
1)the rate of interest
2)the sum
3)the difference between CI and SI on the same sum at the same rate for 3 years.
*guys plz show working i want working fr all the 3 bits it is a sure question i am dead sure bcuz more than 15 papers have this question

a serious question -
are the problems including the elimination of theta in the syllabus or not because I am not able to understand them at all.PLEASE REPLY ASAP

(Warning : This is my first ever farewell message)
I wanted to say all this tomorrow but as I'm seeing that most of you won't come back tomorrow, so I decided to do this today itself.
I'm not so good at literature So try to understand a plain girl in her plain terms.
I came through this website just by chance.i was searching for the answers of a maths Board paper.Then,I come to know there is a Q nd A section too , so i started using that.I met many people here, both good and bad(you know who).The good people helped me with my doubts and I'm very thankful for that.I made some friends too and i believe when you don't know about someone's identity wholly , you can carry on your friendship with that person easily, without any second thoughts.That's my personal experience,I don't know about you guys.
So, to all my friends and all the people out here I wish you the bestest of luck for your coming life.May you all prosper in your respective lives and make your parents proud(that's my dream).May this year be the best academic year.Also, all the artists,singers,dancers(and all people withother hobbies) may make these hobbies their profession,provide they too want that.
I don't know how many of you would be present here at the time of result but I've told someone that I'll try to be present ,So yes I'll try my level best and i want all of you to be present too.
All the best for Maths.
Regards,
Tanisha.

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is this sum possible ?
Construct a triangle ABC with BC=6.2cm and angle A=60° and the altitude through A is 2.6cm..
use ruler and compass only.

How much time should I give for each question?