Question

A machine takes $2$ litres of petrol to start and then $3$ litres per hour while running. What will no. of hours for which machine will run if $2$ litres of petrol is used?

• A. $0$
• B. $1$
• C. $2$
• D. $3$

Answer 1

The correct option is A $0$

Let the amount of petrol used $=y$ and the no. of hours the machine runs $=x$

According to the question, $y=3x+2$

Amount of petrol used, $y=2$

$\therefore 2=3x+2$

$\Rightarrow x=0$