Price of petrol

Number Theory Level 2

The price of Petrol (Gasoline) per liter is 51.30 Rupees. A faulty meter shows 1liter for every 900 ml. What is the actual price that the customer has to pay for 1 liter.


The answer is 57.

Siva Prasad by Siva Prasad , 20, India

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3 solutions

Aashish Patel
Mar 24, 2014

You just have to find the cost of 100ml petrol and then add the price to 900ml litre petrol.

3 Helpful 0 Interesting 0 Brilliant 0 Confused

this is wrong becoz when your machine will read 100 ml it will actually be 90 ml

Abhijeet Malhotra - 7 years, 1 month ago
Noe De La Torre
Nov 1, 2016

Market price or Pm = 51.30

Real Price or Pr = (1000ml/900ml)*Pm

Pr= 57

2 Helpful 0 Interesting 0 Brilliant 0 Confused
Anzar Aznzar
Mar 30, 2014

x = ( 51,3 * 10 ) / 9 = 57

1 Helpful 0 Interesting 0 Brilliant 0 Confused

if the cost of 1000ml gasoline is 51.3rs, then the cost of 900ml gasoline should be less than51.3 rs..

bharadwaj reddy - 7 years, 2 months ago

But its saying that its a faulty meter isn't it

Siva Prasad - 6 years, 9 months ago

The answer should be 56 if it is to be answered in integers. As Rs 51.3 is for 1000 ml and Rs 5.13 is for 100 ml, then 51.3 +5.13=56.43 & not 57.

Nanu Singh - 7 years, 1 month ago

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