If the price of petrol increases by 25 and kevin intends to spend only 15% more on petrol.By how much percent should he reduces the quantity of petrol that he buys?

• ans: 8%
  let Petrol Price 100 per Ltr and Quantity is also 100 Ltr
  then total expenditure is 10000
  Petrol Price is increased by 25% that is 125 rs per litre
  And he increases the expenditure by 15% That will become 11500
  now he uses the quantity = 11500/125 = 92 ltr
  so the quantity is reduced by 8%
• 10 years agoHelpfull: Yes(23) No(2)
• Let C.P = 100
  petrol increased by 25 = 125 (new C.P)
  Kevin spend only 15% = 115
  (115/125)*100 = 92 ltr
  100-92 = 8 %
• 9 years agoHelpfull: Yes(10) No(0)
• let price of petrol be x. he buys y liters of petrol.
  total expenditure=xy
  price increases by 25%
  price= 125x/100
  amount of petrol be reduced by a%
  amount=(100-a)y/100
  since expenditure increases by 15%
  total expenditure= 115xy/100
  125x/100*(100-a)y/100= 115xy/100
  100-a=92
  a=8%
• 10 years agoHelpfull: Yes(7) No(0)
• 100->25%^->125->?->115
  (^=>rise)
  therefore, ((125-115)/125)*100=8%
  he has to reduce by 8%
• 10 years agoHelpfull: Yes(2) No(0)
• Let initial price be Rs. 1 & total spent initial amount be Rs. 100.
  => Quantity= 100/1 = 100
  
  So price after hike= Rs 1.25 & Amount spent = Rs. 115.
  => Quantity= 115/1.25 = 92
  
  Reduce % in quantity = (100-92)*100/100 % = 8%
• 10 years agoHelpfull: Yes(0) No(0)
• Ans is 25% profit
• 6 years agoHelpfull: Yes(0) No(0)
• As Kevin always buys the petrol for 15% increase i.e., 115%
  Petrols increments 25% i.e., 125%
  Kevin wants only to buy 115%
  for that we use (125*100)/115 = 1.8 i.e., 8% increament
• 4 years agoHelpfull: Yes(0) No(0)