The pricee per litere of petrol increases by 20% By what percentage should the consumption be reduceed such that the expenditure increases by 8%?

(1)25%
(2)20%
(3)10%
(4)15%

• (3) 10%
  
  Let the original expenditure was 100, then with 20% increase in price expected expenditure is 120.
  With 8% increase of the original,required expenditure is 108, therefore % reduction in consumption=100 - 100*(108/120) = 10
  
  
• 8 years agoHelpfull: Yes(0) No(0)