Latest Infosys Aptitude Question SOLUTION: If the price of cooking gas increases by 23%, what % of the consumption of gas be reduced by a hotel owner so that the expenditure on gas remains the same?

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If the price of cooking gas increases by 23%, what % of the consumption of gas be reduced by a hotel owner so that the expenditure on gas remains the same?

Asked In Infosys Vignesh (12 years ago)

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lakshman kumar aditya  (12 years ago)

we have one formula for these type of que..
{R/(100+R)*100}% where r=rate of increase in value

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akanksha gupta  (12 years ago)

x=a+b+(a*b)/100
0=23+b+(23*b)/100
-23=123b/100
b=-18.7

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mohammed awais  (12 years ago)

lets have a normal example
suppose initially price was 100 RS for 16 kg of gas(u can take any value)
now price increases by 23% ie 123 RS for 16 kg
but the hotel management want to invest only 100 Rs
therefore in 100Rs we can buy only 13 kg of gas
now lets see the percentage change in weight
13*100/16=81.3
they have to reduce by 100-81.3=18.7

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Rakesh Kumar Kohli  (12 years ago)

Ans. 18.7%

Solution:
With same expenditure the % consumption will be
= 100*100/123 = 81.3%
So the consumption of gas be reduced by a hotel owner so that the expenditure on gas remains the same = 18.7%

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