The price of petrol went up by 20 %. In order | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Let the original price of petrol be $P$ and the original consumption be $C$. The original expenditure is $E = P 	imes C$.If the price increases b

Vedclass · Accepted Answer

$16.67$

Vedclass · Answer

(D) Let the original price of petrol be $P$ and the original consumption be $C$. The original expenditure is $E = P 	imes C$.If the price increases by $20 \%$,the new price $P' = P + 0.20P = 1.20P = \frac{6}{5}P$.To keep the expenditure $E$ constant,let the new consumption be $C'$.$P 	imes C = P' 	imes C'$$P 	imes C = (\frac{6}{5}P) 	imes C'$$C' = \frac{5}{6}C$.The reduction in consumption (travel) is $C - C' = C - \frac{5}{6}C = \frac{1}{6}C$.Percentage reduction $= (\frac{1/6}{1}) 	imes 100 = 16.67 \%$.

The price of petrol went up by $20 \%$. In order to keep expenses the same,Ram must reduce travel by: (in $\%$)

Similar Questions

If the length of a rectangle is increased by $20 \%$ and its breadth is decreased by $10 \%$,what will be the impact on its perimeter?

$A$ man's wages were decreased by $50 \%$. Again,the reduced wages were increased by $50 \%$. He has a loss of:

If one number is $80 \%$ of the other and the sum of their squares is $656$,then the numbers are:

$A$ number increased by $22 \frac{1}{2} \%$ gives $98$. The number is

In a school there are $1500$ students,$44 \%$ of whom are girls. The monthly fee of each boy is $₹ 540$ and the fee of each girl is $25 \%$ less than that of a boy. What is the sum of the monthly fees of all the boys and girls?

Vedclass Test Series

Exam Paper Generator

Online Exam Module