Question

If a certain car can travel $240$ miles on $12$ gallons of gasoline, then at the same rate, calculate how many gallons of gasoline are needed to travel $300$ miles.

• A. $10$
• B. $15$
• C. $20$
• D. $25$
• E. $30$

Answer 1

The correct option is B $15$

We know that

A car can travel $240$ miles on $12$ gallons of gasoline

$\therefore$ A car can travel $1$ miles on $=\frac{12}{240}=\frac{1}{20}$ gallons of gasoline (Unitary method)

In order to travel $300$ miles=$\frac{1}{20}\ast 300=15$ gallons of gasoline is required.