divyalakshmi (student) (153 Points)
27 September 2012frndz.. i am totally unaware how to solve these prblms.. plz help me!!!
1)if a/4 = b/5 = c/9 then a+b+c/ c is a)4 b)2 c)7 d)none of these
2)if a/4 = b/5 then a )a+4 / a-4 = b-5 / b+5 b)a+4 /a-4 =b+5 / b-5 c) a-4 / a+4 = b+5 / b-5 d) none of these
3) if a:b = 4:1 then sq.rt of a/b + sq.rt of b/a is a) 5/2 b)4 c)5 d)none of these
4) if x / b+c-a = y / c+a-b =z / a+b-c then (b-c)x + (c-a)y + (a-b)z is a)1 b) 0 c)5 d) none of thse
Rahul Walame
(Chartered Accountant)
(580 Points)
Replied 18 October 2012
ITS DAMMN SIMPLE
1ST PROBLEM PUT K =A/4
THRE4 A=4K
AND SO ON B=5K
C = 9K
(A+B+C)/C= (4K+5K+9K)/9K
Ttarget='_blank' rel='nofollow' hrefORE 18K/9K =2
SIMILARLY SECOND SUM IS TO BE SOLVED
THIRD SUM
A & B ARE ANY TWO NUMBERS IN THE RATIO 4:1 I WILL ASSUME THAT 4 AND 1 ARE THHE TWO NUMBERS I.E A = 4 AND B=1 A/B = 4/1 AND B/A =1/4
Ttarget='_blank' rel='nofollow' hrefORE SQRT OF A/B IS 2/1 AND SQRT OF B/A IS 1/2
ADDING BOTH OF THESE 2+1/2
=4/2+1/2
=5/2
ANS 5/2
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