Latest TCS Aptitude Question SOLUTION: price of petrol increase by 25%, kevin can increase only additional 15%on petrol. by wich % he shud reduce quantity of petrol purchased?

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price of petrol increase by 25%, kevin can increase only additional 15%on petrol. by wich % he shud reduce quantity of petrol purchased?

Asked In TCS abhilasha (11 years ago)

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Rakesh Kumar  (11 years ago)

Let, x litre of petrol and investment is Rs. 100.
cost of 1 litre of petrol=100/x.
Now, Increased price of 1 litre of petrol= 125/x.
Quantity of petrol purched in Rs. 115= 115x/125.
Reduce in quantity= x-115x/125=10x/125

% reduce in quantity=(10x/125)*100/x
=8%

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nitin pal  (11 years ago)

8%
let x/litre
let initialy we have 100 rs
so petrol get=100/x lit
new prs=5x/4
so,115/5x/4lit=92/xlit
dif=8/x
so 8%

Is this solution Helpfull? Yes (14) | No (1)  

ritu singh  (11 years ago)

let he buy X Lit petrol for---- Rs 100
after 25% increase, he buy X lit for---- Rs 125
now, new price of 1 lit = 125/X
let he can buy Y lit petrol for 125/X per lit for Rs 115
therefore, (125/X)*Y = 115 ------eqn-1
suppose we take X =100 in eqn-1(you can assume X equal to any number)
we get Y=92
therefore, he buys 8 lit less petrol now (X=100 Y=92 diff=X-Y)
% dec= (8/100)*100=8%

Is this solution Helpfull? Yes (7) | No (2)  

basavaraj  (11 years ago)

let initial price of 1 litre petrol=100 rp
new price of petrol=125 rp
amount he can afford=115 rp
for 1 rupee he can buy=(1/125)litre petrol
therefore for 115 rp=(1/125)*115=(23/25)litre
so quqntity of petrol reduced=1-(23/25)=(2/25)
so percentage reduced=2*100/25=8%

Is this solution Helpfull? Yes (4) | No (1)  

sathyapriya  (11 years ago)

easy method
price spend/increase in price==> 115/125
23/25 ... remaining = 2/25 *100 =8%

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