Question

Two cars consumes 20Km/Liter and 15Km/liter of petrol respectively. what is the minimum quantity of petrol the cars needs to have in their petrol tanks to go exactly the same direction?

Answer 1

Hi friend!

In this question, we need to find out how many minimum litres of petrol does each car need to have, if they both have to travel the exact same distance, right? Ok, so let's see;

Mileage of car A: 20kmpl
Mileage of car B: 15kmpl

We need to find LCM of 20 and 15 over here, to find the common distance multiple.

LCM of 20 & 15 is 60km. I have attached a pic. to show you the process of LCM.

Car A and B need x and y litres of petrol to run 60km, respectively.
This can be done by dividing the two figures.

Car A: 60/20 litres = 3 litres
Car B: 60/15 litres = 4 litres

Therefore, Car A needs 3 litres of petrol and Car B needs 4 litres of petrol at the minimum.

There's your answer! Hope you found my answer useful .