ARITHMETIC PAPER QUESTION :-
LENTHS OF THE PERPENDICULAR FROM A POINT IN THE INTERIOR OF
AN EQUILATERAL TRIANGLE ON ITS SIDES ARE 3cm,4cm and
5cm.AREA OF THE TRIANGLE IS (A) 48√3 ; (B) 54√3 ; (C)
72√3 ; (D) 80√3.
PLEASE SOLVE SUBJECTIVELY AND SHOW PROCESS ALSO.
- 1 Answers
- 6921 Views
- I also Faced
- E-Mail Answers
The answer is (A) 48√3.
Let ABC be the Equilateral triangle & O be a point in the
interior of the triangle.
OD,OE & OF BE the respective altitudes drawn on side BC,CA
& AB.
jOIN OA,OB&OC.
Then we have three triangles inside the triangle ABC;Namely
triangle OAB,triangle OBC & triangle OAC.
Now,Area of Equilateral triangle ABC = Sum of the area of
the three triangles OAB,OBC & OAC.
AREA of triangle OBC = 1/2(BC*OE)= 1/2(x*4)
AREA of triangle OAC = 1/2(AC*OF)= 1/2(x*5)
AREA of triangle OAB = 1/2(AB*OD)= 1/2(x*3)
Where,AB = BC = CA = x
BUT,
√3/4(x2)=1/2(x*4)+1/2(x*5)+1/2(x*3)
SOLVE for x.
AND find the AREA by using the formula:
AREA of an Equilateral Triangle = √3/4 (side)2 = √3/4(x2).
| Is This Answer Correct ? | 6 Yes | 3 No |
Hello friend, I have done Bsc in 2008 and qualified for interview in CGLE 2010. University has not given original degree certificate till now. Will SSC demands Original at the time of interview. Can I face some problem. . . amitjha62@yahoo.com
What kind of questions are asked for the post of Assistants in CSS.what is the approximate number of vacancies?
Which institute provide good coaching for SSC Interview?
i have cleared ssc tier1 exam but got no admit card for the second tier examination. what to do now?
ssc tax assistant examination-2008 was cancelled.is it?
Are you in a relationship? If yes then how intimate if no then why ??
Does anybody know the starting gross salary of SSC Data Entry Operator, pay scale 5200-20200 and grade pay 2400?
please tell me the cut of marks is going in combined graduate levelheld on 16th may 2010 for the genral category.........?
I Have selected as a LDC in SAFDARJANG HOSPITAL through SSC BOARD as a central Govt. employee. but there is no any departmental exam in this hospital there is only 10year ACP. SO can I give any departmental exam of upper grade like UDC, Assistant post . And what is the benefit for me after joining central govt. job except age relaxation.
ssc lower division clerk promtions and carrier growth can u explain sir?
can anybody tell me when will the result of ssc tier-I 2010 will come???
hi..I am Rajnish Sharma, Asstt.Audit Officer, in office of the PAG(AUDIT), Ahmedabad, gujrat, want mutual transfer to dehradun, delhi, haryana, or punjab, anyone willing can contact me on 09634115672
SSC History 
